[R] Finding root of quadratic equation
Dear R Helpers, I need to find the root of following equation. 0.0016^2 = (0.001*x)^2 + (0.002 * (1-x))^2 + 2 * 0.7 *0.001*0.002 * x * (1-x). I had tried using animation package as follows. # My Code library(animation) ani.options(nmax = 500) solu = newton.method(function(x) 0.0016^2 - 0.001^2*x^2 - 0.002^2*(1-x)^2 - 2*0.7*0.001*0.002*x*(1-x), 1, c(-1,1)) solu$root # However, I am not getting the solution. Please guide. Amy [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Finding root of quadratic equation
Hi Amy, Not using animation, but this seems to work: f - function(x) 0.0016^2 - 0.001^2*x^2 - 0.002^2*(1-x)^2 - 2*0.7*0.001*0.002*x*(1-x) curve(f, -1, 1) abline(h = 0, lty = 2, col = 'gray') uniroot(f, c(-1,1)) abline(v = .3203, lty = 2, col = 2) HTH, Jorge On Sun, Nov 28, 2010 at 3:43 AM, Amy Milano wrote: Dear R Helpers, I need to find the root of following equation. 0.0016^2 = (0.001*x)^2 + (0.002 * (1-x))^2 + 2 * 0.7 *0.001*0.002 * x * (1-x). I had tried using animation package as follows. # My Code library(animation) ani.options(nmax = 500) solu = newton.method(function(x) 0.0016^2 - 0.001^2*x^2 - 0.002^2*(1-x)^2 - 2*0.7*0.001*0.002*x*(1-x), 1, c(-1,1)) solu$root # However, I am not getting the solution. Please guide. Amy [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Finding root of quadratic equation
Dear Jorge Ivan Velez sir, Thanks a million for your great solution. You have made my Sunday. Thanks again. Regards Amy --- On Sun, 11/28/10, Jorge Ivan Velez jorgeivanve...@gmail.com wrote: From: Jorge Ivan Velez jorgeivanve...@gmail.com Subject: Re: [R] Finding root of quadratic equation To: Amy Milano milano_...@yahoo.com Cc: R mailing list r-help@r-project.org Date: Sunday, November 28, 2010, 8:49 AM Hi Amy, Not using animation, but this seems to work: f - function(x) 0.0016^2 - 0.001^2*x^2 - 0.002^2*(1-x)^2 - 2*0.7*0.001*0.002*x*(1-x) curve(f, -1, 1)abline(h = 0, lty = 2, col = 'gray') uniroot(f, c(-1,1))abline(v = .3203, lty = 2, col = 2) HTH,Jorge On Sun, Nov 28, 2010 at 3:43 AM, Amy Milano wrote: Dear R Helpers, I need to find the root of following equation. 0.0016^2 = (0.001*x)^2 + (0.002 * (1-x))^2 + 2 * 0.7 *0.001*0.002 * x * (1-x). I had tried using animation package as follows. # My Code library(animation) ani.options(nmax = 500) solu = newton.method(function(x) 0.0016^2 - 0.001^2*x^2 - 0.002^2*(1-x)^2 - 2*0.7*0.001*0.002*x*(1-x), 1, c(-1,1)) solu$root # However, I am not getting the solution. Please guide. Amy [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Comparing two functions
Hi. I am new to R and facing a problem that I cannot solve.
I am writing some basic functions. Then I would like to have a master function
that allows me to call one of the functions which I created, but I cannot
figure out how to do so.
Below is an example. The functions rnormIra and runifIra both seem to work
fine. I do not get an error message when entering the definition of the master
function randomIra; however, it fails when I use it to call another function.
Can someone please help?
Thanks.
Ira
rnormIra = function(n, mean) {
return(rnorm(n,mean,1))
}
rnormIra(10,100) #works fine
runifIra = function(n,min,max) {
return(runif(n,min,max))
}
runifIra(5,20,30) #works fine
randomIra = function(f, ...) {
if(f == rnormIra) {
return(rnormIra(n,mean))
}
else {
return(runifIra(n,min,max))
}
} #no error messages
randomIra(rnormIra, n = 5, mean = 20) #FAILS
randomIra(runifIra, n = 5, min = 10, max = 25) #FAILS
do.call(randomIra,list(rnormIra,5,20)) #FAILS
[[alternative HTML version deleted]]
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Re: [R] How to remove a package.
Am 27.11.2010 09:48, schrieb Stephen Liu: I found the datasets of AER cool. detach(package:AER, unload = TRUE) detach(package:AER) works for me. data() still found car there. you mean cars ? This is not part of AER but in a base R installation. install.packages(EcDat) Where can I download/install EcDat? TIA It is case sensitive, try install.packages(Ecdat) it works for me... Maybe you should try a little bit more... hth Stefan __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Where is gdata?
Hi folks, Win 7 64 bit R 32 bit install.packages(gregmisc) Installing package(s) into âC:\Users\satimiswin764\Documents/R/win-library/2.12â (as âlibâ is unspecified) --- Please select a CRAN mirror for use in this session --- also installing the dependency âgmodelsâ trying URL 'http://cran.ms.unimelb.edu.au/bin/windows/contrib/2.12/gmodels_2.15.0.zip' Content type 'application/zip' length 76016 bytes (74 Kb) opened URL downloaded 74 Kb trying URL 'http://cran.ms.unimelb.edu.au/bin/windows/contrib/2.12/gregmisc_2.1.1.zip' Content type 'application/zip' length 97482 bytes (95 Kb) opened URL downloaded 95 Kb package 'gmodels' successfully unpacked and MD5 sums checked package 'gregmisc' successfully unpacked and MD5 sums checked The downloaded packages are in C:\Users\satimiswin764\AppData\Local\Temp\RtmpP3dNfa\downloaded_packages Installation went through without problem. library(gregmisc) Loading required package: gmodels Loading required package: gplots Loading required package: gtools Loading required package: caTools Loading required package: bitops Loading required package: grid Attaching package: 'gplots' The following object(s) are masked from 'package:stats': lowess Warning message: The `gregmisc' *package* has converted into a *bundle* containing four sub-packages: gdata, gtools, gmodels, and gplots. Please load these packages directly. library(gdata) gdata Error: object 'gdata' not found gdata() Error: could not find function gdata Please advise what mistake I have committed. TIA B.R. Stephen L [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Where to download R .xls sample files?
Hi folks, Which R packages containing sample .xls files? TIA B.R. Stephen L [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Where to download R .xls sample files?
On 2010-11-28 19:46, Stephen Liu wrote: Hi folks, Which R packages containing sample .xls files? TIA why do you need .xls format data file? B.R. Stephen L __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] How to load data file without attribute names?
Thank you very much. What I actually do was data1 - read.delim(path,head=FALSE,sep=,) motor_UPDRS -data1[5] qqnorm(motor_UPDRS) I eventually noticed that I missed a , in the second command. And I cannot retrieve a vector correctly. -- View this message in context: http://r.789695.n4.nabble.com/How-to-load-data-file-without-attribute-names-tp3061489p3062333.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] How to remove a package.
Hi Stefan, Tks for your advice. detach(package:AER) data() Data sets in package âcarâ: detach(package:car) data() Data sets in package âdatasetsâ. I have to run detach twice getting back to package 'datasets' install.packages(Ecdat) Installing package(s) into âC:\Users\satimiswin764\Documents/R/win-library/2.12â (as âlibâ is unspecified) trying URL 'http://cran.ms.unimelb.edu.au/bin/windows/contrib/2.12/Ecdat_0.1-6.zip' Content type 'application/zip' length 2817531 bytes (2.7 Mb) opened URL downloaded 2.7 Mb package 'Ecdat' successfully unpacked and MD5 sums checked The downloaded packages are in C:\Users\satimiswin764\AppData\Local\Temp\RtmpP3dNfa\downloaded_packages d Package installed. Installation went through w/o problem. library(Ecdat) data() Data sets in package âdatasetsâ NOT 'Ecdat' ??Ecdat ... Ecdat::Caschool The California Test Score Data Set Ecdat::GrilichesWage Datas Ecdat::MCAS The Massashusets Test Score Data Set Ecdat::MunExp Municipal Expenditure Data Ecdat::Orange The Orange Juice Data Set Ecdat::SolowSolow's Technological Change Data Ecdat::TranspEq Statewide Data on Transportation Equipment Manufacturing Those files are in Ecdat packages. Caschool Error: object 'Caschool' not found MCAS Error: object 'MCAS' not found Please help. TIA B.R. Stephen L From: Stefan Grosse singularit...@gmx.net Sent: Sun, November 28, 2010 7:23:19 PM Subject: Re: [R] How to remove a package. Am 27.11.2010 09:48, schrieb Stephen Liu: I found the datasets of AER cool. detach(package:AER, unload = TRUE) detach(package:AER) works for me. data() still found car there. you mean cars ? This is not part of AER but in a base R installation. install.packages(EcDat) Where can I download/install EcDat? TIA It is case sensitive, try install.packages(Ecdat) it works for me... Maybe you should try a little bit more... hth Stefan [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Where to download R .xls sample files?
Hi, why do you need .xls format data file? For learning. I found following video: http://www.youtube.com/watch?v=Hq0JmSnBX8Ifeature=mfu_in_orderlist=UL I need econdat.xls, Excel file B.R. Stephen L From: Jinsong Zhao jsz...@yeah.net To: r-help@r-project.org Sent: Sun, November 28, 2010 7:54:14 PM Subject: Re: [R] Where to download R .xls sample files? On 2010-11-28 19:46, Stephen Liu wrote: Hi folks, Which R packages containing sample .xls files? TIA why do you need .xls format data file? B.R. Stephen L __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Where is gdata?
On Sun, Nov 28, 2010 at 12:44 PM, Stephen Liu sati...@yahoo.com wrote: library(gdata) gdata Error: object 'gdata' not found gdata() Error: could not find function gdata Please advise what mistake I have committed. TIA Try help(package=gdata) Regards Liviu B.R. Stephen L [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Do you know how to read? http://www.alienetworks.com/srtest.cfm http://goodies.xfce.org/projects/applications/xfce4-dict#speed-reader Do you know how to write? http://garbl.home.comcast.net/~garbl/stylemanual/e.htm#e-mail __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Comparing two functions
Hi,
Your function fails for a number of reasons. One of them is your
comparison (use browser() to see what is the value taken by f in your
function). Also, n, mean, min and max could not be extracted from ...
with your construction.
Here's my suggestion,
randomIra = function(f=runif, ...){
switch(f,
rnorm = do.call(rnorm, c(sd=1, list(...))) ,
runif = , # will use the next one, which is also the default
runif(...))
}
randomIra(rnorm, n = 5, mean = 20)
randomIra(runif, n=5, min = 10, max = 25)
randomIra(, n=5, min = 10, max = 25) # default
HTH,
baptiste
On 28 November 2010 11:53, Ira Sharenow irasharenow...@yahoo.com wrote:
Hi. I am new to R and facing a problem that I cannot solve.
I am writing some basic functions. Then I would like to have a master
function that allows me to call one of the functions which I created, but I
cannot figure out how to do so.
Below is an example. The functions rnormIra and runifIra both seem to work
fine. I do not get an error message when entering the definition of the
master function randomIra; however, it fails when I use it to call another
function.
Can someone please help?
Thanks.
Ira
rnormIra = function(n, mean) {
return(rnorm(n,mean,1))
}
rnormIra(10,100) #works fine
runifIra = function(n,min,max) {
return(runif(n,min,max))
}
runifIra(5,20,30) #works fine
randomIra = function(f, ...) {
if(f == rnormIra) {
return(rnormIra(n,mean))
}
else {
return(runifIra(n,min,max))
}
} #no error messages
randomIra(rnormIra, n = 5, mean = 20) #FAILS
randomIra(runifIra, n = 5, min = 10, max = 25) #FAILS
do.call(randomIra,list(rnormIra,5,20)) #FAILS
[[alternative HTML version deleted]]
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
__
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] \Sweaveopts error
On 27/11/2010 8:59 PM, John Maindonald wrote:
Actually, I had until I created this file had everything on one line,
or had separate \SweaveOpts commands.
Putting everything on one line ensures that the graphics file
goes to the subdirectory snArt, but the file test1.tex is unchanged.
Note however the difference between the files test1.tex and
test.tex, irrespective of the 1 line or 2 issue. The first of the
\SweaveOpts lines had an effect, unless I am missing something.
I'm confused now. Where does test.tex come from? It's not in the
directory referred to below, and I don't see it mentioned earlier in
this thread.
Duncan Murdoch
John.
John Maindonald email: john.maindon...@anu.edu.au
phone : +61 2 (6125)3473fax : +61 2(6125)5549
Centre for Mathematics Its Applications, Room 1194,
John Dedman Mathematical Sciences Building (Building 27)
Australian National University, Canberra ACT 0200.
http://www.maths.anu.edu.au/~johnm
On 28/11/2010, at 12:40 PM, Duncan Murdoch wrote:
On 27/11/2010 7:57 PM, John Maindonald wrote:
Actually, I spoke too soon. The files process without obvious error,
but keep.source=TRUE is ignored. I have posted small files
test1.Rnw and test2.Rnw that can be used to demonstrate the
problems at:
http://wwwmaths.anu.edu.au/~johnm/r/issues/
In the test1.Rnw file, your \SweaveOpts statement spans two lines. Sweave()
doesn't recognize it, so it's completely ignored.
I don't think this is new behaviour; it's a consequence of the way Sweave looks
for \SweaveOpts via regular expression.
Not quite sure what's going on in the second one yet...
Duncan Murdoch
Sweave(test1) ## includes SweaveOpts settings
Sweave(test2, keep.source=TRUE)
## SweaveOpts settings have been removed.
Comments do not appear in the LaTeX file that results, the code
is reformatted and the graph from test1 goes into the working
directory.
Notice also the NA that mysteriously appears in the second
line of code in output .tex file test2.tex
John.
John Maindonald email: john.maindon...@anu.edu.au
phone : +61 2 (6125)3473fax : +61 2(6125)5549
Centre for Mathematics Its Applications, Room 1194,
John Dedman Mathematical Sciences Building (Building 27)
Australian National University, Canberra ACT 0200.
http://www.maths.anu.edu.au/~johnm
On 26/11/2010, at 4:26 PM, John Maindonald wrote:
Yes, that has fixed the problem. (2010-11-24 r53659)
Thanks.
John Maindonald email: john.maindon...@anu.edu.au
phone : +61 2 (6125)3473fax : +61 2(6125)5549
Centre for Mathematics Its Applications, Room 1194,
John Dedman Mathematical Sciences Building (Building 27)
Australian National University, Canberra ACT 0200.
http://www.maths.anu.edu.au/~johnm
On 25/11/2010, at 10:56 PM, Duncan Murdoch wrote:
On 25/11/2010 6:34 AM, John Maindonald wrote:
I have a file 4lmetc.Rnw, intended for inclusion in a LaTeX document,
that starts:
I think this may have been fixed in the patched version. Could you give it a
try to confirm? If not, please send me a simplified version of the file, and
I'll see what's going wrong.
Duncan Murdoch
\SweaveOpts{engine=R, keep.source=TRUE}
\SweaveOpts{eps=FALSE, prefix.string=snArt/4lmetc}
The attempt to process the file through Sweave generates the error:
Sweave(4lmetc)
Writing to file 4lmetc.tex
Processing code chunks ...
1 : keep.source term verbatim
Error in file(srcfile$filename, open = rt, encoding = encoding) :
cannot open the connection
In addition: Warning message:
In file(srcfile$filename, open = rt, encoding = encoding) :
cannot open file '4lmetc': No such file or directory
The same file processes through Stangle() without problems.
If I comment out the \Sweaveopts lines, there is no problem,
except that I do not get the options that I want.
This processed fine in R-2.11.1
sessionInfo()
R version 2.12.0 (2010-10-15)
Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)
locale:
[1] C
attached base packages:
[1] stats graphics grDevices utils datasets grid methods
[8] base
other attached packages:
[1] lattice_0.19-13 DAAG_1.02 randomForest_4.5-36
[4] rpart_3.1-46MASS_7.3-8 reshape_0.8.3
[7] plyr_1.2.1 proto_0.3-8
loaded via a namespace (and not attached):
[1] ggplot2_0.8.8 latticeExtra_0.6-14
Is there a workaround?
John Maindonald email: john.maindon...@anu.edu.au
phone : +61 2 (6125)3473fax : +61 2(6125)5549
Centre for MathematicsIts Applications, Room 1194,
John Dedman Mathematical Sciences Building (Building 27)
Australian National University, Canberra ACT 0200.
http://www.maths.anu.edu.au/~johnm
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] Comparing two functions
On Sun, Nov 28, 2010 at 5:53 AM, Ira Sharenow irasharenow...@yahoo.com wrote:
Hi. I am new to R and facing a problem that I cannot solve.
I am writing some basic functions. Then I would like to have a master
function that allows me to call one of the functions which I created, but I
cannot figure out how to do so.
Below is an example. The functions rnormIra and runifIra both seem to work
fine. I do not get an error message when entering the definition of the
master function randomIra; however, it fails when I use it to call another
function.
rnormIra = function(n, mean) {
return(rnorm(n,mean,1))
}
rnormIra(10,100) #works fine
runifIra = function(n,min,max) {
return(runif(n,min,max))
}
runifIra(5,20,30) #works fine
randomIra = function(f, ...) {
if(f == rnormIra) {
return(rnormIra(n,mean))
}
else {
return(runifIra(n,min,max))
}
} #no error messages
randomIra(rnormIra, n = 5, mean = 20) #FAILS
randomIra(runifIra, n = 5, min = 10, max = 25) #FAILS
do.call(randomIra,list(rnormIra,5,20)) #FAILS
Try this:
randomIra - function(f, ...) if (identical(f, rnormIra))
rnormIra(...) else runifIra(...)
--
Statistics Software Consulting
GKX Group, GKX Associates Inc.
tel: 1-877-GKX-GROUP
email: ggrothendieck at gmail.com
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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Re: [R] return vector of element names for vector, matrix or array
On 11/27/2010 6:13 PM, Joshua Wiley wrote: Interesting use of outer, but I think you're overthinking it ;) expand.grid(dimnames(x3)) Ah, thanks. I guess I was thinking outer the box ;-) If you want it as a vector separated by colons... apply(expand.grid(dimnames(x3)), 1, paste, collapse = :) -- Michael Friendly Email: friendly AT yorku DOT ca Professor, Psychology Dept. York University Voice: 416 736-5115 x66249 Fax: 416 736-5814 4700 Keele StreetWeb: http://www.datavis.ca Toronto, ONT M3J 1P3 CANADA __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] How to remove a package.
On Nov 28, 2010, at 7:16 AM, Stephen Liu wrote: Hi Stefan, Tks for your advice. snipped Installation went through w/o problem. library(Ecdat) data() Data sets in package ‘datasets’ NOT 'Ecdat' ??Ecdat ... Ecdat::Caschool The California Test Score Data Set Ecdat::GrilichesWage Datas Ecdat::MCAS The Massashusets Test Score Data Set Ecdat::MunExp Municipal Expenditure Data Ecdat::Orange The Orange Juice Data Set Ecdat::SolowSolow's Technological Change Data Ecdat::TranspEq Statewide Data on Transportation Equipment Manufacturing Those files are in Ecdat packages. Caschool Error: object 'Caschool' not found MCAS Error: object 'MCAS' not found Because loading the package does not necessarily register the datasets: require(Ecdat) Loading required package: Ecdat data() #-- produces a large list including Car Stated Preferences for Car Choice Caschool The California Test Score Data Set Catsup Choice of Brand for Catsup CigarCigarette Consumption str(Caschool) Error in str(Caschool) : object 'Caschool' not found data(Car) str(Car) 'data.frame': 4654 obs. of 70 variables: $ choice: Factor w/ 6 levels choice1,choice2,..: 1 2 5 5 5 5 2 5 5 2 ... $ college : num 0 1 0 0 0 0 1 1 0 1 ... $ hsg2 : num 0 1 1 0 1 0 1 0 0 0 ... Note that this dataset was NEVER spelled car. -- David. From: Stefan Grosse singularit...@gmx.net Sent: Sun, November 28, 2010 7:23:19 PM Subject: Re: [R] How to remove a package. Am 27.11.2010 09:48, schrieb Stephen Liu: I found the datasets of AER cool. detach(package:AER, unload = TRUE) detach(package:AER) works for me. data() still found car there. you mean cars ? This is not part of AER but in a base R installation. install.packages(EcDat) Where can I download/install EcDat? TIA It is case sensitive, try install.packages(Ecdat) it works for me... Maybe you should try a little bit more... hth Stefan [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. David Winsemius, MD West Hartford, CT __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Where is gdata?
Hi, Greg, Stephen, Liviu:
I tried install.packages('gregmisc'), which Stephen said he
had. Then help(pac=gdata) seemed to work normally. However, when I
then tried library(gdata), I got an error message from the the
operating system, saying perl.exe has stopped working. I cancelled
past that and got a message gdata: Unable to load perl libaries needed
by read.xls() ... Run the function 'installXLSXsupport()'. I tried
'installXLSXsupport()' and again perl stopped working. I quit R and
tried install.packages('gdata') again, and it killed perl again.
Before installing 'gregmisc', I had tried
install.packages('gdata') by itself. That seemed to work. Then I
manually removed it and tried 'gregmisc', as Stephen had, and got
problems I don't know how to solve.
???
Thanks,
Spencer
##
library(gdata)
gdata: Unable to load perl libaries needed by read.xls()
gdata: to support 'XLX' (Excel 97-2004) files.
gdata: Unable to load perl libaries needed by read.xls()
gdata: to support 'XLSX' (Excel 2007+) files.
gdata: Run the function 'installXLSXsupport()'
gdata: to automatically download and install the perl
gdata: libaries needed to support Excel XLS and XLSX formats.
sessionInfo()
R version 2.12.0 (2010-10-15)
Platform: i386-pc-mingw32/i386 (32-bit)
locale:
[1] LC_COLLATE=English_United States.1252
[2] LC_CTYPE=English_United States.1252
[3] LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C
[5] LC_TIME=English_United States.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] gdata_2.8.1
loaded via a namespace (and not attached):
[1] gtools_2.6.2 tools_2.12.0
#
On 11/28/2010 4:22 AM, Liviu Andronic wrote:
On Sun, Nov 28, 2010 at 12:44 PM, Stephen Liusati...@yahoo.com wrote:
library(gdata)
gdata
Error: object 'gdata' not found
gdata()
Error: could not find function gdata
Please advise what mistake I have committed. TIA
Try
help(package=gdata)
Regards
Liviu
B.R.
Stephen L
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--
Spencer Graves, PE, PhD
President and Chief Operating Officer
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751 Emerson Ct.
San José, CA 95126
ph: 408-655-4567
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Re: [R] Where is gdata?
On Sun, Nov 28, 2010 at 10:40 AM, Spencer Graves
spencer.gra...@structuremonitoring.com wrote:
I tried install.packages('gregmisc'), which Stephen said he had.
Then help(pac=gdata) seemed to work normally. However, when I then
tried library(gdata), I got an error message from the the operating
system, saying perl.exe has stopped working. I cancelled past that and
got a message gdata: Unable to load perl libaries needed by read.xls() ...
Run the function 'installXLSXsupport()'. I tried 'installXLSXsupport()'
and again perl stopped working. I quit R and tried
install.packages('gdata') again, and it killed perl again.
Before installing 'gregmisc', I had tried install.packages('gdata') by
itself. That seemed to work. Then I manually removed it and tried
'gregmisc', as Stephen had, and got problems I don't know how to solve.
???
Thanks,
Spencer
##
library(gdata)
gdata: Unable to load perl libaries needed by read.xls()
gdata: to support 'XLX' (Excel 97-2004) files.
gdata: Unable to load perl libaries needed by read.xls()
gdata: to support 'XLSX' (Excel 2007+) files.
gdata: Run the function 'installXLSXsupport()'
gdata: to automatically download and install the perl
gdata: libaries needed to support Excel XLS and XLSX formats.
Read ?installXLSXsupport
--
Statistics Software Consulting
GKX Group, GKX Associates Inc.
tel: 1-877-GKX-GROUP
email: ggrothendieck at gmail.com
__
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] How to remove a package.
Hi David, Thanks for your advice. I got it. But I can't resolve: library(AER) Loading required package: car Loading required package: MASS Loading required package: nnet Loading required package: survival Loading required package: splines Loading required package: Formula Loading required package: lmtest Loading required package: zoo Loading required package: sandwich Loading required package: strucchange data() displays Data sets in package âAERâ: But; library(Ecdat) data() displays Data sets in package âdatasetsâ: a large datasets including those in package Ecdat? NOt only Ecdat separately. B.R. Stephen L From: David Winsemius dwinsem...@comcast.net Cc: Stefan Grosse singularit...@gmx.net; r-help@r-project.org Sent: Sun, November 28, 2010 11:16:34 PM Subject: Re: [R] How to remove a package. On Nov 28, 2010, at 7:16 AM, Stephen Liu wrote: Hi Stefan, Tks for your advice. snipped Installation went through w/o problem. library(Ecdat) data() Data sets in package âdatasetsâ NOT 'Ecdat' ??Ecdat ... Ecdat::Caschool The California Test Score Data Set Ecdat::GrilichesWage Datas Ecdat::MCAS The Massashusets Test Score Data Set Ecdat::MunExp Municipal Expenditure Data Ecdat::Orange The Orange Juice Data Set Ecdat::SolowSolow's Technological Change Data Ecdat::TranspEq Statewide Data on Transportation Equipment Manufacturing Those files are in Ecdat packages. Caschool Error: object 'Caschool' not found MCAS Error: object 'MCAS' not found Because loading the package does not necessarily register the datasets: require(Ecdat) Loading required package: Ecdat data() #-- produces a large list including Car Stated Preferences for Car Choice Caschool The California Test Score Data Set Catsup Choice of Brand for Catsup CigarCigarette Consumption str(Caschool) Error in str(Caschool) : object 'Caschool' not found data(Car) str(Car) 'data.frame':4654 obs. of 70 variables: $ choice: Factor w/ 6 levels choice1,choice2,..: 1 2 5 5 5 5 2 5 5 2 ... $ college : num 0 1 0 0 0 0 1 1 0 1 ... $ hsg2 : num 0 1 1 0 1 0 1 0 0 0 ... Note that this dataset was NEVER spelled car. -- David. From: Stefan Grosse singularit...@gmx.net Sent: Sun, November 28, 2010 7:23:19 PM Subject: Re: [R] How to remove a package. Am 27.11.2010 09:48, schrieb Stephen Liu: I found the datasets of AER cool. detach(package:AER, unload = TRUE) detach(package:AER) works for me. data() still found car there. you mean cars ? This is not part of AER but in a base R installation. install.packages(EcDat) Where can I download/install EcDat? TIA It is case sensitive, try install.packages(Ecdat) it works for me... Maybe you should try a little bit more... hth Stefan [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. David Winsemius, MD West Hartford, CT [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] How to remove a package.
On Sun, Nov 28, 2010 at 4:58 PM, Stephen Liu sati...@yahoo.com wrote: data() displays Data sets in package ‘AER’: But; library(Ecdat) data() displays Data sets in package ‘datasets’: a large datasets including those in package Ecdat? NOt only Ecdat separately. Read ?data. Try data(package='AER') data(package='Ecdat') Regards Liviu B.R. Stephen L From: David Winsemius dwinsem...@comcast.net Cc: Stefan Grosse singularit...@gmx.net; r-help@r-project.org Sent: Sun, November 28, 2010 11:16:34 PM Subject: Re: [R] How to remove a package. On Nov 28, 2010, at 7:16 AM, Stephen Liu wrote: Hi Stefan, Tks for your advice. snipped Installation went through w/o problem. library(Ecdat) data() Data sets in package ‘datasets’ NOT 'Ecdat' ??Ecdat ... Ecdat::Caschool The California Test Score Data Set Ecdat::Griliches Wage Datas Ecdat::MCAS The Massashusets Test Score Data Set Ecdat::MunExp Municipal Expenditure Data Ecdat::Orange The Orange Juice Data Set Ecdat::Solow Solow's Technological Change Data Ecdat::TranspEq Statewide Data on Transportation Equipment Manufacturing Those files are in Ecdat packages. Caschool Error: object 'Caschool' not found MCAS Error: object 'MCAS' not found Because loading the package does not necessarily register the datasets: require(Ecdat) Loading required package: Ecdat data() #-- produces a large list including Car Stated Preferences for Car Choice Caschool The California Test Score Data Set Catsup Choice of Brand for Catsup Cigar Cigarette Consumption str(Caschool) Error in str(Caschool) : object 'Caschool' not found data(Car) str(Car) 'data.frame': 4654 obs. of 70 variables: $ choice : Factor w/ 6 levels choice1,choice2,..: 1 2 5 5 5 5 2 5 5 2 ... $ college : num 0 1 0 0 0 0 1 1 0 1 ... $ hsg2 : num 0 1 1 0 1 0 1 0 0 0 ... Note that this dataset was NEVER spelled car. -- David. From: Stefan Grosse singularit...@gmx.net Sent: Sun, November 28, 2010 7:23:19 PM Subject: Re: [R] How to remove a package. Am 27.11.2010 09:48, schrieb Stephen Liu: I found the datasets of AER cool. detach(package:AER, unload = TRUE) detach(package:AER) works for me. data() still found car there. you mean cars ? This is not part of AER but in a base R installation. install.packages(EcDat) Where can I download/install EcDat? TIA It is case sensitive, try install.packages(Ecdat) it works for me... Maybe you should try a little bit more... hth Stefan [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. David Winsemius, MD West Hartford, CT [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Do you know how to read? http://www.alienetworks.com/srtest.cfm http://goodies.xfce.org/projects/applications/xfce4-dict#speed-reader Do you know how to write? http://garbl.home.comcast.net/~garbl/stylemanual/e.htm#e-mail __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Where is gdata?
Hello, All:
Prof. Ripley suggested I remove RTools/perl from my path. I did
that leaving Strawberry perl. Then everything seemed to work
appropriately.
Thanks to all.
Spencer
On 11/28/2010 7:49 AM, Gabor Grothendieck wrote:
On Sun, Nov 28, 2010 at 10:40 AM, Spencer Graves
spencer.gra...@structuremonitoring.com wrote:
I tried install.packages('gregmisc'), which Stephen said he had.
Then help(pac=gdata) seemed to work normally. However, when I then
tried library(gdata), I got an error message from the the operating
system, saying perl.exe has stopped working. I cancelled past that and
got a message gdata: Unable to load perl libaries needed by read.xls() ...
Run the function 'installXLSXsupport()'. I tried 'installXLSXsupport()'
and again perl stopped working. I quit R and tried
install.packages('gdata') again, and it killed perl again.
Before installing 'gregmisc', I had tried install.packages('gdata') by
itself. That seemed to work. Then I manually removed it and tried
'gregmisc', as Stephen had, and got problems I don't know how to solve.
???
Thanks,
Spencer
##
library(gdata)
gdata: Unable to load perl libaries needed by read.xls()
gdata: to support 'XLX' (Excel 97-2004) files.
gdata: Unable to load perl libaries needed by read.xls()
gdata: to support 'XLSX' (Excel 2007+) files.
gdata: Run the function 'installXLSXsupport()'
gdata: to automatically download and install the perl
gdata: libaries needed to support Excel XLS and XLSX formats.
Read ?installXLSXsupport
--
Spencer Graves, PE, PhD
President and Chief Operating Officer
Structure Inspection and Monitoring, Inc.
751 Emerson Ct.
San José, CA 95126
ph: 408-655-4567
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] Where to download R .xls sample files?
On Sun, 28 Nov 2010 03:46:45 -0800 (PST) sati...@yahoo.com wrote: SL Hi folks, SL SL Which R packages containing sample .xls files? TIA Help yourself! Create your own! If you do not have Excel use OpenOffice and save as xls! Stefan __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] predict.drm not generating confidence intervals
R-helpers,
I recently submitted a help request for the predict.drm function found in the
drc package. I am still having issues with the function and I am submitting
reproducible code hoping that somebody can help me figure out what is going on.
library(drc)
# Fit a 4 parameter logistic model to ryegrass dataset
fit - drm(rootl ~ conc, data = ryegrass, fct = LL.4())
summary(fit)
# Generate a fake dataset for prediction
newdt - data.frame( matrix(c(seq(0.2, 9, 0.01), rep(NA,881)), ncol=2))
colnames(newdt) - c('rootl', 'conc')
# Generate prediction intervals and confidence intervals
prd.p - predict(fit, newdata=newdt, interval='prediction')
prd.c - predict(fit, newdata=newdt, interval='confidence')
# Check output
head(prd.p)
Prediction Lower Upper
[1,] 7.790812NANA
[2,] 7.790476NANA
[3,] 7.790106NANA
[4,] 7.789702NANA
[5,] 7.789262NANA
[6,] 7.788784NANA
head(prd.c)
Prediction Lower Upper
[1,] 7.790812NANA
[2,] 7.790476NANA
[3,] 7.790106NANA
[4,] 7.789702NANA
[5,] 7.789262NANA
[6,] 7.788784NANA
There appears to be a problem with the predict.drc function. This code
previous generated confidence and prediction intervals in columns 2 and 3 of
the prediction matrices but now fails for reasons unknown to me. Anyone have
an idea of what is going on and how I can remedy the situation?
Brant Inman
[[alternative HTML version deleted]]
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and provide commented, minimal, self-contained, reproducible code.
Re: [R] Legend symbols mixed char and integer
On Sun, 28 Nov 2010 07:54:43 + (GMT), Prof Brian Ripley rip...@stats.ox.ac.uk wrote: On Sat, 27 Nov 2010, Mike Prager wrote: I need to generate a plot with both open and filled circles. It is simple enough, using pch=1 and pch=16. The R pdf graphics output is going into pdftex 1.40.10 (MikTeX 2.8). The R pdf is correct when viewed in other viewers. However, pdftex fills the open circles. I can work around this problem by using pch=o for the open circles. However, that messes up the figure legend. Is it possible to use the pch argument of legend() to specify both a symbol number and a character? I haven't found the way. You don't need to. pch=o is the same as pch=111 (the ASCII number). See ?points. Or is there some known work-around for the pdftex bug? Well, pdftex is not a viewer and does not of itself process PDF inclusions, but see ?pdf and the 'useDingbats' argument. If you really think this is a bug in your LaTeX system, you should report it. But you haven't shown us reproducible code, and similar things have worked for me in the past. Many thanks to Brian R. I obtained the desired plot by using 'useDingbats = FALSE', after switching from 'savePlot' to 'dev.copy2pdf', which allows that argument. Thanks especially for the reference to 'points'. Though I had looked several other places for a mapping of 'pch' to characters, I hadn't thought of looking there. To clarify, I doubt that this is an R bug. The PDF displays wrong only when it goes through pdftex. I am not knowledgable enough about pdf or epstex to trace the error's origin. If it would help anyone, I will attempt later to develop simple reproducible code demonstrating this. -- Mike Prager, NC, USA (Remove pi from email to use) __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] predict.drm not generating confidence intervals
Puzzled. Why are the data you offer to predict() for the independent
variable, conc, all NA's? Is there something reversed or inverted
about how drc functions handle formulas.
--
David.
On Nov 28, 2010, at 2:33 PM, Brant Inman wrote:
R-helpers,
I recently submitted a help request for the predict.drm function
found in the drc package. I am still having issues with the
function and I am submitting reproducible code hoping that somebody
can help me figure out what is going on.
library(drc)
# Fit a 4 parameter logistic model to ryegrass dataset
fit - drm(rootl ~ conc, data = ryegrass, fct = LL.4())
summary(fit)
# Generate a fake dataset for prediction
newdt - data.frame( matrix(c(seq(0.2, 9, 0.01), rep(NA,881)),
ncol=2))
colnames(newdt) - c('rootl', 'conc')
# Generate prediction intervals and confidence intervals
prd.p - predict(fit, newdata=newdt, interval='prediction')
prd.c - predict(fit, newdata=newdt, interval='confidence')
# Check output
head(prd.p)
Prediction Lower Upper
[1,] 7.790812NANA
[2,] 7.790476NANA
[3,] 7.790106NANA
[4,] 7.789702NANA
[5,] 7.789262NANA
[6,] 7.788784NANA
head(prd.c)
Prediction Lower Upper
[1,] 7.790812NANA
[2,] 7.790476NANA
[3,] 7.790106NANA
[4,] 7.789702NANA
[5,] 7.789262NANA
[6,] 7.788784NANA
There appears to be a problem with the predict.drc function. This
code previous generated confidence and prediction intervals in
columns 2 and 3 of the prediction matrices but now fails for reasons
unknown to me. Anyone have an idea of what is going on and how I
can remedy the situation?
Brant Inman
[[alternative HTML version deleted]]
__
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
David Winsemius, MD
West Hartford, CT
__
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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[R] how to divide each column in a matrix by its colSums?
Hi, I have a matrix, say m=matrix(c( 983,679,134, 383,416,84, 2892,2625,570 ),nrow=3 ) i can find its row/col sum by rowSums(m) colSums(m) How do I divide each row/column by its rowSum/colSums and still return in the matrix form? (i.e. the new rowSums/colSums =1) Thanks. Casper -- View this message in context: http://r.789695.n4.nabble.com/how-to-divide-each-column-in-a-matrix-by-its-colSums-tp3062739p3062739.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] how to divide each column in a matrix by its colSums?
Hi Casper, Try m/colSums(m) m/rowSums(m) HTH, Jorge On Sun, Nov 28, 2010 at 3:46 PM, casperyc wrote: Hi, I have a matrix, say m=matrix(c( 983,679,134, 383,416,84, 2892,2625,570 ),nrow=3 ) i can find its row/col sum by rowSums(m) colSums(m) How do I divide each row/column by its rowSum/colSums and still return in the matrix form? (i.e. the new rowSums/colSums =1) Thanks. Casper -- View this message in context: http://r.789695.n4.nabble.com/how-to-divide-each-column-in-a-matrix-by-its-colSums-tp3062739p3062739.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] how to divide each column in a matrix by its colSums?
In that case, there are values 1, which is clearly not what I wanted. Thanks. I think I should use prop.table -- View this message in context: http://r.789695.n4.nabble.com/how-to-divide-each-column-in-a-matrix-by-its-colSums-tp3062739p3062752.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] unexpected behavior using round to 2 digits on randomly generated numbers
Hello! I stumbled upon something odd that took a while to track down, and I wanted to run it by here to see if I should submit a bug report. For randomly generated numbers (from a variety of distributions) rounding them to specifically 2 digits and then multiplying them by 100 produces strange results on about 8% of cases. The problematic numbers display as I would have expected, but do not logically match the as.integer counterpart (additionally they will not be used correctly by functions such as rep()). I realize there are easy workarounds, but I wouldn't have expected this result, and it only occurs rounding to 2 decimals, i.e. changing digits to 3 and multiplying by 1000 after rounding gives the expected result. x-runif(100) #generate some random numbers y-round(x,digits=2)*100 #round them all to two decimals, then multiply them all by 100. I expected the results to all be integers sum(y!=as.integer(y)) #but on about 8% of the numbers they do not match the integer version x[which(y!=as.integer(y))] # a list of the problem numbers from the original distribution. They seem to be more common but not exclusive to .54 to .57 y[which(y!=as.integer(y))] #the numbers still display as would be expected, i.e. they are integers as.integer(y[which(y!=as.integer(y))]) # and sometimes display as the same number they are not logically identical to Thanks, and sorry if I came across something that is known, or it is meant to behave this way, I couldn't find anything. Cory Rieth R.version() output: platform x86_64-apple-darwin9.8.0 arch x86_64 os darwin9.8.0 system x86_64, darwin9.8.0 status major 2 minor 12.0 year 2010 month 10 day15 svn rev53317 language R version.string R version 2.12.0 (2010-10-15) __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] unexpected behavior using round to 2 digits on randomly generated numbers
On Nov 28, 2010, at 4:20 PM, Cory Rieth wrote: Hello! I stumbled upon something odd that took a while to track down, and I wanted to run it by here to see if I should submit a bug report. For randomly generated numbers (from a variety of distributions) rounding them to specifically 2 digits and then multiplying them by 100 produces strange results on about 8% of cases. The problematic numbers display as I would have expected, but do not logically match the as.integer counterpart (additionally they will not be used correctly by functions such as rep()). I realize there are easy workarounds, but I wouldn't have expected this result, and it only occurs rounding to 2 decimals, i.e. changing digits to 3 and multiplying by 1000 after rounding gives the expected result. x-runif(100)#generate some random numbers y-round(x,digits=2)*100 #round them all to two decimals, then multiply them all by 100. I expected the results to all be integers sum(y!=as.integer(y)) #but on about 8% of the numbers they do not match the integer version x[which(y!=as.integer(y))] # a list of the problem numbers from the original distribution. They seem to be more common but not exclusive to .54 to .57 y[which(y!=as.integer(y))] #the numbers still display as would be expected, i.e. they are integers as.integer(y[which(y!=as.integer(y))]) # and sometimes display as the same number they are not logically identical to Thanks, and sorry if I came across something that is known, or it is meant to behave this way, I couldn't find anything. It's one of the FAQ and probably the most F-ly of the FAQ's. #21 or #31 if I remember (vaguely) ... the one about why seq(0.1, 1, by=0.1) == (1:11)/10 returns 2 FALSE's. -- David. Cory Rieth R.version() output: platform x86_64-apple-darwin9.8.0 arch x86_64 os darwin9.8.0 system x86_64, darwin9.8.0 status major 2 minor 12.0 year 2010 month 10 day15 svn rev53317 language R version.string R version 2.12.0 (2010-10-15) __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. David Winsemius, MD West Hartford, CT __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] how to divide each column in a matrix by its colSums?
prop.table divides every element by the matrix total, not its colSums: m - matrix(1:4, 2) m [,1] [,2] [1,]13 [2,]24 prop.table(m) [,1] [,2] [1,] 0.1 0.3 [2,] 0.2 0.4 m/rowSums(m) divides every row by its rowSum: m/rowSums(m) [,1] [,2] [1,] 0.250 0.750 [2,] 0.333 0.667 To divide every element by its colSum: t(t(m)/rowSums(t(m))) [,1] [,2] [1,] 0.333 0.4285714 [2,] 0.667 0.5714286 Hope this helps. Spencer On 11/28/2010 12:55 PM, casperyc wrote: In that case, there are values1, which is clearly not what I wanted. Thanks. I think I should use prop.table __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] unexpected behavior using round to 2 digits on randomly generated numbers
On 28/11/2010 4:20 PM, Cory Rieth wrote: Hello! I stumbled upon something odd that took a while to track down, and I wanted to run it by here to see if I should submit a bug report. For randomly generated numbers (from a variety of distributions) rounding them to specifically 2 digits and then multiplying them by 100 produces strange results on about 8% of cases. The problematic numbers display as I would have expected, but do not logically match the as.integer counterpart (additionally they will not be used correctly by functions such as rep()). I realize there are easy workarounds, but I wouldn't have expected this result, and it only occurs rounding to 2 decimals, i.e. changing digits to 3 and multiplying by 1000 after rounding gives the expected result. This is presumably another version of FAQ 7.31. Very few numbers of the form n/100 are exactly representable in floating point, and the rounding error sometimes shows up when you multiply by 100. A simpler version of this is the following: y - 1:99 y[(y/100)*100 != y] [1] 7 14 28 29 55 56 57 58 Duncan Murdoch x-runif(100)#generate some random numbers y-round(x,digits=2)*100 #round them all to two decimals, then multiply them all by 100. I expected the results to all be integers sum(y!=as.integer(y)) #but on about 8% of the numbers they do not match the integer version x[which(y!=as.integer(y))] # a list of the problem numbers from the original distribution. They seem to be more common but not exclusive to .54 to .57 y[which(y!=as.integer(y))] #the numbers still display as would be expected, i.e. they are integers as.integer(y[which(y!=as.integer(y))]) # and sometimes display as the same number they are not logically identical to Thanks, and sorry if I came across something that is known, or it is meant to behave this way, I couldn't find anything. Cory Rieth R.version() output: platform x86_64-apple-darwin9.8.0 arch x86_64 os darwin9.8.0 system x86_64, darwin9.8.0 status major 2 minor 12.0 year 2010 month 10 day15 svn rev53317 language R version.string R version 2.12.0 (2010-10-15) __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] unexpected behavior using round to 2 digits on randomly generated numbers
On 2010-11-28 13:20, Cory Rieth wrote: Hello! I stumbled upon something odd that took a while to track down, and I wanted to run it by here to see if I should submit a bug report. For randomly generated numbers (from a variety of distributions) rounding them to specifically 2 digits and then multiplying them by 100 produces strange results on about 8% of cases. The problematic numbers display as I would have expected, but do not logically match the as.integer counterpart (additionally they will not be used correctly by functions such as rep()). I realize there are easy workarounds, but I wouldn't have expected this result, and it only occurs rounding to 2 decimals, i.e. changing digits to 3 and multiplying by 1000 after rounding gives the expected result. x-runif(100)#generate some random numbers y-round(x,digits=2)*100 #round them all to two decimals, then multiply them all by 100. I expected the results to all be integers sum(y!=as.integer(y)) #but on about 8% of the numbers they do not match the integer version x[which(y!=as.integer(y))] # a list of the problem numbers from the original distribution. They seem to be more common but not exclusive to .54 to .57 y[which(y!=as.integer(y))] #the numbers still display as would be expected, i.e. they are integers as.integer(y[which(y!=as.integer(y))]) # and sometimes display as the same number they are not logically identical to Thanks, and sorry if I came across something that is known, or it is meant to behave this way, I couldn't find anything. Hmm, how hard have you looked? I doubt that I'll be the first to remind you to check the FAQ. Peter Ehlers Cory Rieth R.version() output: platform x86_64-apple-darwin9.8.0 arch x86_64 os darwin9.8.0 system x86_64, darwin9.8.0 status major 2 minor 12.0 year 2010 month 10 day15 svn rev53317 language R version.string R version 2.12.0 (2010-10-15) __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] how to divide each column in a matrix by its colSums?
I am using prop.table(m,1) and prop.table(m,2) my aim. which I think is the most 'easy' way. Thanks. Casper -- View this message in context: http://r.789695.n4.nabble.com/how-to-divide-each-column-in-a-matrix-by-its-colSums-tp3062739p3062797.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] non-linear fourth-order differential equations
I need to solve a system of non-linear fourth-order differential equations. Is there a command which solves this system? Thanks in advance. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] how to divide each column in a matrix by its colSums?
sweep(m,1,rowSums(m),/) sweep(m,2,colSums(m),/) On 11/28/2010 9:55 PM, casperyc wrote: In that case, there are values 1, which is clearly not what I wanted. Thanks. I think I should use prop.table __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] unexpected behavior using round to 2 digits on randomly generated numbers
FAQ 7.31 http://cran.r-project.org/doc/FAQ/R-FAQ.html#Why-doesn_0027t-R-think-these-numbers-are-equal_003f You find it odd that the result is not an integer, while I find the fact that your calculation actually works reliably with any number of digits surprising, and you should avoid assuming such behavior will continue in the future. Multiply by the appropriate range and THEN take the integer part. Patient: Doctor, it hurts when I ram my head into the wall! Doctor: Don't do that! Cory Rieth wrote: Hello! I stumbled upon something odd that took a while to track down, and I wanted to run it by here to see if I should submit a bug report. For randomly generated numbers (from a variety of distributions) rounding them to specifically 2 digits and then multiplying them by 100 produces strange results on about 8% of cases. The problematic numbers display as I would have expected, but do not logically match the as.integer counterpart (additionally they will not be used correctly by functions such as rep()). I realize there are easy workarounds, but I wouldn't have expected this result, and it only occurs rounding to 2 decimals, i.e. changing digits to 3 and multiplying by 1000 after rounding gives the expected result. x-runif(100)#generate some random numbers y-round(x,digits=2)*100 #round them all to two decimals, then multiply them all by 100. I expected the results to all be integers sum(y!=as.integer(y)) #but on about 8% of the numbers they do not match the integer version x[which(y!=as.integer(y))] # a list of the problem numbers from the original distribution. They seem to be more common but not exclusive to .54 to .57 y[which(y!=as.integer(y))] #the numbers still display as would be expected, i.e. they are integers as.integer(y[which(y!=as.integer(y))]) # and sometimes display as the same number they are not logically identical to Thanks, and sorry if I came across something that is known, or it is meant to behave this way, I couldn't find anything. Cory Rieth R.version() output: platform x86_64-apple-darwin9.8.0 arch x86_64 os darwin9.8.0 system x86_64, darwin9.8.0 status major 2 minor 12.0 year 2010 month 10 day15 svn rev53317 language R version.string R version 2.12.0 (2010-10-15) __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] unexpected behavior using round to 2 digits on randomly generated numbers
On Nov 28, 2010, at 4:43 PM, David Winsemius wrote: On Nov 28, 2010, at 4:20 PM, Cory Rieth wrote: Hello! I stumbled upon something odd that took a while to track down, and I wanted to run it by here to see if I should submit a bug report. For randomly generated numbers (from a variety of distributions) rounding them to specifically 2 digits and then multiplying them by 100 produces strange results on about 8% of cases. The problematic numbers display as I would have expected, but do not logically match the as.integer counterpart (additionally they will not be used correctly by functions such as rep()). I realize there are easy workarounds, but I wouldn't have expected this result, and it only occurs rounding to 2 decimals, i.e. changing digits to 3 and multiplying by 1000 after rounding gives the expected result. x-runif(100)#generate some random numbers y-round(x,digits=2)*100 #round them all to two decimals, then multiply them all by 100. I expected the results to all be integers sum(y!=as.integer(y)) #but on about 8% of the numbers they do not match the integer version x[which(y!=as.integer(y))] # a list of the problem numbers from the original distribution. They seem to be more common but not exclusive to .54 to .57 y[which(y!=as.integer(y))] #the numbers still display as would be expected, i.e. they are integers as.integer(y[which(y!=as.integer(y))]) # and sometimes display as the same number they are not logically identical to Thanks, and sorry if I came across something that is known, or it is meant to behave this way, I couldn't find anything. It's one of the FAQ and probably the most F-ly of the FAQ's. #21 or #31 if I remember (vaguely) ... the one about why seq(0.1, 1, by=0.1) == (1:11)/10 returns 2 FALSE's. er, make that /. ^(1:10)^ -- David. Cory Rieth R.version() output: platform x86_64-apple-darwin9.8.0 arch x86_64 os darwin9.8.0 system x86_64, darwin9.8.0 status major 2 minor 12.0 year 2010 month 10 day15 svn rev53317 language R version.string R version 2.12.0 (2010-10-15) __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. David Winsemius, MD West Hartford, CT __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. David Winsemius, MD West Hartford, CT __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] how to divide each column in a matrix by its colSums?
Thanks: I didn't read the prop.table help page with sufficient care. On 11/28/2010 1:48 PM, casperyc wrote: I am using prop.table(m,1) and prop.table(m,2) my aim. which I think is the most 'easy' way. Thanks. Casper -- Spencer Graves, PE, PhD President and Chief Operating Officer Structure Inspection and Monitoring, Inc. 751 Emerson Ct. San José, CA 95126 ph: 408-655-4567 __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] predict.drm not generating confidence intervals
Brant,
See below.
On 2010-11-28 12:25, David Winsemius wrote:
Puzzled. Why are the data you offer to predict() for the independent
variable, conc, all NA's? Is there something reversed or inverted
about how drc functions handle formulas.
-- David. On Nov 28, 2010, at 2:33 PM, Brant Inman wrote:
R-helpers,
I recently submitted a help request for the predict.drm function
found in the drc package. I am still having issues with the
function and I am submitting reproducible code hoping that somebody
can help me figure out what is going on.
library(drc)
# Fit a 4 parameter logistic model to ryegrass dataset
fit- drm(rootl ~ conc, data = ryegrass, fct = LL.4())
summary(fit)
# Generate a fake dataset for prediction
newdt- data.frame( matrix(c(seq(0.2, 9, 0.01), rep(NA,881)),
ncol=2))
colnames(newdt)- c('rootl', 'conc')
# Generate prediction intervals and confidence intervals
prd.p- predict(fit, newdata=newdt, interval='prediction')
prd.c- predict(fit, newdata=newdt, interval='confidence')
# Check output
head(prd.p)
Prediction Lower Upper
[1,] 7.790812NANA
[2,] 7.790476NANA
[3,] 7.790106NANA
[4,] 7.789702NANA
[5,] 7.789262NANA
[6,] 7.788784NANA
head(prd.c)
Prediction Lower Upper
[1,] 7.790812NANA
[2,] 7.790476NANA
[3,] 7.790106NANA
[4,] 7.789702NANA
[5,] 7.789262NANA
[6,] 7.788784NANA
There appears to be a problem with the predict.drc function. This
code previous generated confidence and prediction intervals in
columns 2 and 3 of the prediction matrices but now fails for reasons
unknown to me. Anyone have an idea of what is going on and how I
can remedy the situation?
As David points out, you seem to have your dose and response
mixed up. But even assuming that you mean to predict rootl
from conc, the predict.drc function needs to be used in a
certain way (and that is not clear in the documentation).
Try this:
fit - drm(rootl ~ conc, data = ryegrass, fct = LL.4())
newdat - data.frame(conc = seq(0, 30, len=101), apples=1)
ypred - predict(fit, newdata=newdat, interval=confidence)
head(ypred, 3)
PredictionLowerUpper
[1,] 7.792958 7.399614 8.186303
[2,] 7.785771 7.400046 8.171495
[3,] 7.736545 7.380584 8.092505
Wondering about the 'apples'? That's just to show that
predict.drc doesn't care what you call your second column.
It seems that predict.drc requires either *no* newdata
or a *two*-variable data.frame in which the first column
(it, too, can have *any* name) contains the dose at which
to predict and the second column contains the 'curveid',
aka the grouping variable (if you have one). In your
case, the grouping reduces to a single group, i.e. a
vector of all '1's.
This could all be made considerably clearer in the documentation.
Peter Ehlers
Brant Inman
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] predict.drm not generating confidence intervals
I interpreted the to be that predict.drc was expecting a third
argument, curveid, which had no default, and that creating a
dataframe like this was going to solve the problem.
newdt - data.frame( conc= seq(0.2, 9, 0.01) , CURVE=1)
prd.p - predict(fit, newdata=newdt, curveid=CURVE,
interval=confidence)
head(prd.p)
PredictionLowerUpper
[1,] 7.790812 7.400131 8.181492
[2,] 7.790476 7.400161 8.180791
[3,] 7.790106 7.400185 8.180028
[4,] 7.789702 7.400203 8.179202
[5,] 7.789262 7.400213 8.178311
[6,] 7.788784 7.400215 8.177352
--
David
On Nov 28, 2010, at 5:19 PM, Peter Ehlers wrote:
Brant,
See below.
On 2010-11-28 12:25, David Winsemius wrote:
Puzzled. Why are the data you offer to predict() for the independent
variable, conc, all NA's? Is there something reversed or inverted
about how drc functions handle formulas.
-- David. On Nov 28, 2010, at 2:33 PM, Brant Inman wrote:
R-helpers,
I recently submitted a help request for the predict.drm function
found in the drc package. I am still having issues with the
function and I am submitting reproducible code hoping that
somebody
can help me figure out what is going on.
library(drc)
# Fit a 4 parameter logistic model to ryegrass dataset
fit- drm(rootl ~ conc, data = ryegrass, fct = LL.4())
summary(fit)
# Generate a fake dataset for prediction
newdt- data.frame( matrix(c(seq(0.2, 9, 0.01), rep(NA,881)),
ncol=2))
colnames(newdt)- c('rootl', 'conc')
# Generate prediction intervals and confidence intervals
prd.p- predict(fit, newdata=newdt, interval='prediction')
prd.c- predict(fit, newdata=newdt, interval='confidence')
# Check output
head(prd.p)
Prediction Lower Upper
[1,] 7.790812NANA
[2,] 7.790476NANA
[3,] 7.790106NANA
[4,] 7.789702NANA
[5,] 7.789262NANA
[6,] 7.788784NANA
head(prd.c)
Prediction Lower Upper
[1,] 7.790812NANA
[2,] 7.790476NANA
[3,] 7.790106NANA
[4,] 7.789702NANA
[5,] 7.789262NANA
[6,] 7.788784NANA
There appears to be a problem with the predict.drc function.
This
code previous generated confidence and prediction intervals in
columns 2 and 3 of the prediction matrices but now fails for
reasons
unknown to me. Anyone have an idea of what is going on and how I
can remedy the situation?
As David points out, you seem to have your dose and response
mixed up. But even assuming that you mean to predict rootl
from conc, the predict.drc function needs to be used in a
certain way (and that is not clear in the documentation).
Try this:
fit - drm(rootl ~ conc, data = ryegrass, fct = LL.4())
newdat - data.frame(conc = seq(0, 30, len=101), apples=1)
ypred - predict(fit, newdata=newdat, interval=confidence)
head(ypred, 3)
PredictionLowerUpper
[1,] 7.792958 7.399614 8.186303
[2,] 7.785771 7.400046 8.171495
[3,] 7.736545 7.380584 8.092505
Wondering about the 'apples'? That's just to show that
predict.drc doesn't care what you call your second column.
It seems that predict.drc requires either *no* newdata
or a *two*-variable data.frame in which the first column
(it, too, can have *any* name) contains the dose at which
to predict and the second column contains the 'curveid',
aka the grouping variable (if you have one). In your
case, the grouping reduces to a single group, i.e. a
vector of all '1's.
This could all be made considerably clearer in the documentation.
Peter Ehlers
Brant Inman
David Winsemius, MD
West Hartford, CT
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
[R] weighted x variables with glm
I have a glm regression (quasi-poisson) of log(mu) on x but I have varying degrees of confidence in the x values, and can attach a numerical weighting to each. Can anyone help me with suggestions of how to analysise this. Is there an R package that would help? Wendy [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] periodic time series
Hi all, A beginner's question: I have to analyse univariate, strongly periodic data collected every hour for a period of 1 week and I need to compare 5 different groups for significant differences between them. Is there a better way to do this in R, other than pairwise t-tests of summary statistics? Thanks in advance, Andy -- View this message in context: http://r.789695.n4.nabble.com/periodic-time-series-tp3062866p3062866.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Plotting a cloud/fog of variable density in rgl
Thanks for both the replies. I think you can come closest to what you want within rgl by using sprites rather than rendering transparent spheres. See examples(sprites3d). Sprites helps a lot indeed. With enough transparency I am close to what I want. If you only have 2 things with simple properties, namely point emitters as your organisms and a uniform concsntration of transparent scatters ( the fog) you can probably derive geometrical optics expressions for the ray trace results and just integrate those over your source distribution. This should be reasonably easy in R. I haven't been to siggraph since 1983 so can't help much but you can probably find analyitcal solutions for fog on google and just sum up your source distribution. I guess you could even do some wave optics etc as presumably the fog could be done as a function of wavelength just as easily. In any case, if you only have two basic things with simple disto should be reasonably easy to do in R with your own code. I am afraid this is a bit too advanced for me. I know next to nothing regarding digital 3D imaging and, even if I could compute this, I am not sure how I would plot the result. My goal is really to add this to my R-plotting arsenal and use it in routine, not to develop something very specific for this particular application. But thank you for taking the time to reply, maybe I'll come back to this when I know more. JiHO --- http://maururu.net __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] non-linear fourth-order differential equations
Hi Yanika, Please try ?uniroot and ?ployroot f - function(x) x^4-16 uniroot(f, lower= -3, upper=0) polyroot(c(-16,0,0,0,1)) - A R learner. -- View this message in context: http://r.789695.n4.nabble.com/non-linear-fourth-order-differential-equations-tp3062805p3062894.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] periodic time series
Hi Andy, If you could provide a sample data set, it would help others to give a solution. I suggest look at the data and select a model, then anova. Take group as one variable, record time (1 to 24 ) as the second variable and the week day (Monday to Friday) as the third variable. Then test the interaction between three variables at first. I hope the following code helps. df - data.frame(value = rnorm(24*5*5), group = rep(1:5,5*24), time = rep(1:24,each=5), day = rep(c(M,T,W,R,F),each=24)) anova(lm(value ~ group*time*day,data=df),lm(value ~ group*time*day-group:time:day,data=df)) - A R learner. -- View this message in context: http://r.789695.n4.nabble.com/periodic-time-series-tp3062866p3062908.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] sqlUpdate error with MS acces
Hi, I am running the RODBC examples form the help guide. I am trying to UPDATE a table in an Access data base but I am having an error. library(RODBC) library(termstrc) path = getwd() setwd(getwd()) dbName = data.mdb pathdbname = paste(path,/,dbName,sep=) accesChannel = odbcConnectAccess(pathdbname, uid = , pwd = ) sqlSave(accesChannel, USArrests, rownames = state, addPK=TRUE) sqlFetch(accesChannel , USArrests, rownames = state) # get the lot foo - cbind(state=row.names(USArrests), USArrests)[1:3, c(1,3)] foo[1:3,2] - sqlUpdate(accesChannel , foo, USArrests) The sqlSave and sqlFetch command seem to work fine. foo state Assault Alabama Alabama Alaska Alaska Arizona Arizona sqlUpdate(accesChannel , foo, USArrests) Error in sqlUpdate(accesChannel, foo, USArrests) : cannot update 'USArrests' without unique column I am using R 2.12.0(2010-10-15) Using Microsoft access 2003. Furthermore, the sqlColumns(accesChannel , USArrests) returns the following information sqlColumns(accesChannel , USArrests) TABLE_CAT TABLE_SCHEM TABLE_NAME 1 C:\\ARTIFICALDESKTOP\\CurrentDownloads\\termstrc\\dataNA USArrests 2 C:\\ARTIFICALDESKTOP\\CurrentDownloads\\termstrc\\dataNA USArrests 3 C:\\ARTIFICALDESKTOP\\CurrentDownloads\\termstrc\\dataNA USArrests 4 C:\\ARTIFICALDESKTOP\\CurrentDownloads\\termstrc\\dataNA USArrests 5 C:\\ARTIFICALDESKTOP\\CurrentDownloads\\termstrc\\dataNA USArrests COLUMN_NAME DATA_TYPE TYPE_NAME COLUMN_SIZE BUFFER_LENGTH DECIMAL_DIGITS 1 state12 VARCHAR 255 510 NA 2 Murder 8DOUBLE 53 8 NA 3 Assault 4 INTEGER 10 4 0 4UrbanPop 4 INTEGER 10 4 0 5Rape 8DOUBLE 53 8 NA NUM_PREC_RADIX NULLABLE REMARKS COLUMN_DEF SQL_DATA_TYPE SQL_DATETIME_SUB 1 NA1NA NA12 NA 2 21NA NA 8 NA 3 101NA NA 4 NA 4 101NA NA 4 NA 5 21NA NA 8 NA CHAR_OCTET_LENGTH ORDINAL_POSITION IS_NULLABLE ORDINAL 1 5101 YES 1 2NA2 YES 2 3NA3 YES 3 4NA4 YES 4 5NA5 YES 5 Any ideas as of what might I have missed? Thanks, Jorge __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] weighted x variables with glm
Hi Wendy, In case you haven't see it, the glm function accepts an optional weights argument. Michael On 29 November 2010 09:42, Wendy Anderson newhorizonscand...@gmail.com wrote: I have a glm regression (quasi-poisson) of log(mu) on x but I have varying degrees of confidence in the x values, and can attach a numerical weighting to each. Can anyone help me with suggestions of how to analysise this. Is there an R package that would help? Wendy [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] weighted x variables with glm
In case you haven't see it, the glm function accepts an optional weights argument. Thanks for the reply. But the philosopy behind weighting is the assumption of unequal variance in the y values. In normal regression one assumes that the x values are known without error Wendy Sorry Wendy - I posted my reply prior to engaging my brain (ie. didn't read your question properly). You're talking about Model II / major axis type methods. The smatr package might cater for what you're trying to do. Hope this helps (more). Michael __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] weighted x variables with glm
Hello again Wendy, Actually, the simex package is probably a more useful suggestion... http://www.stat.uni-muenchen.de/~helmut/Texte/Simex_Rnews.pdf Michael On 29 November 2010 13:55, Michael Bedward michael.bedw...@gmail.com wrote: In case you haven't see it, the glm function accepts an optional weights argument. Thanks for the reply. But the philosopy behind weighting is the assumption of unequal variance in the y values. In normal regression one assumes that the x values are known without error Wendy Sorry Wendy - I posted my reply prior to engaging my brain (ie. didn't read your question properly). You're talking about Model II / major axis type methods. The smatr package might cater for what you're trying to do. Hope this helps (more). Michael __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] How do I subtract sequential values ?
Just starting to learn R so excuse me if this is a simple question. I'm wondering how I get the percent difference in sequential values in one column of a dataframe. If I had a dataframe and one of the columns was value, how would I go about calculating (v2-v1)/v1 (v3-v2)/v2 (v4-v3)/v3 ...etc ? -- View this message in context: http://r.789695.n4.nabble.com/How-do-I-subtract-sequential-values-tp3063019p3063019.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Array help
Hi! I am learning R and have a question that is probably fairly simple for those of you much more learned than I. I am messing with Arrays and am doing some simple stuff to get the hang of them. I will have a seperate array already pulled up and it will have columns and rows. I figured out that I can seperate these out with commands like array_name[,1,1]. Now, I have an array where I want to make a single array from a two ranges in the original array. from 1:7 and 12:34. I know if i just did it with 1:7 it is just array_name[1:7,,] and that is it. But i wanted 12:34 in there as well. I assumed at first that it would just be array_name[1:7 12:34,,] but was wrong. Can anyone help me with this? Thanks so much! -B -- View this message in context: http://r.789695.n4.nabble.com/Array-help-tp3062992p3062992.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Where is gdata?
Hi, Stephen:
What operating system do you have? From the path you cite, I
assume you are using some version of Windows.
Wikipedia on perl says there are two primary version of perl
for Windows Strawberry perl, which is free, open source, and
ActivePerl, which is free but not open source. I've been using
Strawberry perl without any apparent problems due to the version. When
I removed ~Rtools/perl from my path, it still had Strawberry perl, and
'installXLSXsupport()' worked with my installation of Strawberry perl,
when it had not worked with ~Rtools/perl. You can download Strawberry
perl from http://strawberryperl.com;. However,
RSiteSearch('strawberry perl') produced 0 matches, while
RSiteSearch(ActivePerl) returned 2 matches and RSiteSearch(Active
Perl) found 10 matches.
After downloading and installing one of these, if
'installXLSXsupport()' still does not work, you need to check the path:
If 'installXLSXsupport()' does not work with Strawberry perl as the
first perl in your path, then you may need to install an appropriate
package from CPAN. More than that, I cannot answer. However, if you
download and install one of these two versions of perl and still have
the problem, please report what you've done and they symptoms you get to
this list. Also, please include sessionInfo() with your reply.
Hope this helps.
Spencer
On 11/28/2010 6:38 PM, Stephen Liu wrote:
Hi Spencer,
Win 7
I can't find the folders RTools\perl
perl is on C:\Users\satimis\My Document\R\win-library\2.12\gdata\perl
Nor I can find the folder Strawberry perl. Can you help? TIA
B.R.
Stephen L
From: Spencer Gravesspencer.gra...@structuremonitoring.com
To: Stephen Liusati...@yahoo.com
Sent: Mon, November 29, 2010 12:58:25 AM
Subject: Re: [R] Where is gdata?
Hi, Stephen: Have you solved the problem yet? If no, see below. Spencer
###
Hello, All:
Prof. Ripley suggested I remove RTools/perl from my path. I did
that leaving Strawberry perl. Then everything seemed to work appropriately.
Thanks to all.
Spencer
On 11/28/2010 7:49 AM, Gabor Grothendieck wrote:
On Sun, Nov 28, 2010 at 10:40 AM, Spencer Graves
spencer.gra...@structuremonitoring.com wrote:
I tried install.packages('gregmisc'), which Stephen said he had.
Then help(pac=gdata) seemed to work normally. However, when I then
tried library(gdata), I got an error message from the the operating
system, saying perl.exe has stopped working. I cancelled past that and
got a message gdata: Unable to load perl libaries needed by read.xls() ...
Run the function 'installXLSXsupport()'. I tried 'installXLSXsupport()'
and again perl stopped working. I quit R and tried
install.packages('gdata') again, and it killed perl again.
Before installing 'gregmisc', I had tried install.packages('gdata') by
itself. That seemed to work. Then I manually removed it and tried
'gregmisc', as Stephen had, and got problems I don't know how to solve.
???
Thanks,
Spencer
##
library(gdata)
gdata: Unable to load perl libaries needed by read.xls()
gdata: to support 'XLX' (Excel 97-2004) files.
gdata: Unable to load perl libaries needed by read.xls()
gdata: to support 'XLSX' (Excel 2007+) files.
gdata: Run the function 'installXLSXsupport()'
gdata: to automatically download and install the perl
gdata: libaries needed to support Excel XLS and XLSX formats.
Read ?installXLSXsupport
--
Spencer Graves, PE, PhD
President and Chief Operating Officer
Structure Inspection and Monitoring, Inc.
751 Emerson Ct.
San José, CA 95126
ph: 408-655-4567
__
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] How do I subtract sequential values ?
Hi Eric, I think this does what you want. It may be a simple question, but that does not necessarily mean the easiest/fastest answer is intuitive. Welcome to R! dat - data.frame(v = 1:100) ## the with() is just a convenient way to avoid having to type ## dat$v every single time---similar to attach(), but cleaner ## the idea is to create three vectors, that are offset by removing ## either the first observation or the last with(dat, (v[-1] - v[-length(v)])/v[-length(v)]) HTH, Josh On Sun, Nov 28, 2010 at 7:29 PM, eric ericst...@aol.com wrote: Just starting to learn R so excuse me if this is a simple question. I'm wondering how I get the percent difference in sequential values in one column of a dataframe. If I had a dataframe and one of the columns was value, how would I go about calculating (v2-v1)/v1 (v3-v2)/v2 (v4-v3)/v3 ...etc ? -- View this message in context: http://r.789695.n4.nabble.com/How-do-I-subtract-sequential-values-tp3063019p3063019.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Joshua Wiley Ph.D. Student, Health Psychology University of California, Los Angeles http://www.joshuawiley.com/ __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Array help
Hi B, What you need to do is pass a vector with the indices you want to extract. So, you have 1:7 (which expands to 1, 2, 3, ... 7) and 12:34 (which again expands). How would you combine two sets of numbers? c(), the combine or concatenate function. Putting this in action: mya - array(1:510, dim = c(34, 5, 3)) mya[c(1:7, 12:34), , ] Do note that the row numbers will update unless they were explicitly named. So they will be numbered 1:30, not 1:7 and 12:34. Cheers, Josh On Sun, Nov 28, 2010 at 6:36 PM, bfhancock brianfhanc...@gmail.com wrote: Hi! I am learning R and have a question that is probably fairly simple for those of you much more learned than I. I am messing with Arrays and am doing some simple stuff to get the hang of them. I will have a seperate array already pulled up and it will have columns and rows. I figured out that I can seperate these out with commands like array_name[,1,1]. Now, I have an array where I want to make a single array from a two ranges in the original array. from 1:7 and 12:34. I know if i just did it with 1:7 it is just array_name[1:7,,] and that is it. But i wanted 12:34 in there as well. I assumed at first that it would just be array_name[1:7 12:34,,] but was wrong. Can anyone help me with this? Thanks so much! -B -- View this message in context: http://r.789695.n4.nabble.com/Array-help-tp3062992p3062992.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Joshua Wiley Ph.D. Student, Health Psychology University of California, Los Angeles http://www.joshuawiley.com/ __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Replacing several rows of a matrix at once
Hello Folks. This must be a silly question with a (not) obvious (to me) answer. Consider this: tmp - matrix(1:200, nrow = 20) vec - 300:309 tmp[9,] - vec # replacing one row works fine p - c(3, 11, 17) tmp[p,] - vec # replacing multple rows pastes the values down a column and recycles vec. What I want to do is replace multiple rows simultaneously at once. I suppose I can write a function, but this seems pretty fundamental so I feel I must be missing some obvious alternative. I'm feeling like I'm in the Inferno! TIA. Bryan * Bryan Hanson Professor of Chemistry Biochemistry DePauw University, Greencastle IN USA sessionInfo() R version 2.12.0 (2010-10-15) Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit) locale: [1] en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8 attached base packages: [1] splines datasets tools grid grDevices graphics utils stats [9] methods base other attached packages: [1] survival_2.35-8gridExtra_0.7 GGally_0.2.2 xtable_1.5-6 [5] mvbutils_2.5.1 ggplot2_0.8.8 proto_0.3-8reshape_0.8.3 [9] ChemoSpec_1.46 seriation_1.0-2colorspace_1.0-1 TSP_1.0-1 [13] R.utils_1.5.3 R.oo_1.7.4 R.methodsS3_1.2.1 rgl_0.92.794 [17] lattice_0.19-13mvoutlier_1.4 plyr_1.2.1 RColorBrewer_1.0-2 [21] chemometrics_1.0 som_0.3-5 robustbase_0.5-0-1 rpart_3.1-46 [25] pls_2.1-0 pcaPP_1.8-3mvtnorm_0.9-92 nnet_7.3-1 [29] mclust_3.4.6 MASS_7.3-8 lars_0.9-7 gclus_1.3 [33] cluster_1.13.1 e1071_1.5-24 class_7.3-2 __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Array help
Josh, the data set is called StatTemps and is in the PASWR package. I want to make an array that involves only the 8 a.m. and a separate array that involves only the 9 a.m. so i can get info on the temperatures in those groups. So I still want it in the format of StatTemps but in two arrays that are based on 8 a.m. or 9 a.m.I have been messing with this for a while. And no it's not homework, I am just trying to learn R so I am more appealing out in the field eventually. They book I am using is confusing! Hopefully what I am trying to do isn't confusing. I want to do an array that holds the info from 1:6 12:22 for 8am and then 7:11 23:34 for 9am. I was able easily make two arrays based on sex by just putting in StatTemps[1:11,,] StatTemps[12:34,,] and assumed I could just go StatTemps[1:612:22,,] and StatTemps[7:1123:34,,] but that didn't work. Any ideas? Thanks so much! -B -- View this message in context: http://r.789695.n4.nabble.com/Array-help-tp3062992p3063033.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] How do I subtract sequential values ?
On 2010-11-28 19:38, Joshua Wiley wrote: Hi Eric, I think this does what you want. It may be a simple question, but that does not necessarily mean the easiest/fastest answer is intuitive. Welcome to R! dat- data.frame(v = 1:100) ## the with() is just a convenient way to avoid having to type ## dat$v every single time---similar to attach(), but cleaner ## the idea is to create three vectors, that are offset by removing ## either the first observation or the last with(dat, (v[-1] - v[-length(v)])/v[-length(v)]) HTH, Josh That's a good first-time user solution. Then, since this is R, here's the next step: v - sample(50, 100, replace = TRUE) result - diff(v) / v[-length(v)] Peter Ehlers On Sun, Nov 28, 2010 at 7:29 PM, ericericst...@aol.com wrote: Just starting to learn R so excuse me if this is a simple question. I'm wondering how I get the percent difference in sequential values in one column of a dataframe. If I had a dataframe and one of the columns was value, how would I go about calculating (v2-v1)/v1 (v3-v2)/v2 (v4-v3)/v3 ...etc ? -- View this message in context: http://r.789695.n4.nabble.com/How-do-I-subtract-sequential-values-tp3063019p3063019.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Replacing several rows of a matrix at once
vec is being recycled column wise, so you can repeat each element the required number of times: tmp[p,] - rep(vec, each = length(p)) There's many ways to achieve this though, so it depends on what other variations you might want to deal with. Cheers, Mike. On Mon, Nov 29, 2010 at 2:53 PM, Bryan Hanson han...@depauw.edu wrote: Hello Folks. This must be a silly question with a (not) obvious (to me) answer. Consider this: tmp - matrix(1:200, nrow = 20) vec - 300:309 tmp[9,] - vec # replacing one row works fine p - c(3, 11, 17) tmp[p,] - vec # replacing multple rows pastes the values down a column and recycles vec. What I want to do is replace multiple rows simultaneously at once. I suppose I can write a function, but this seems pretty fundamental so I feel I must be missing some obvious alternative. I'm feeling like I'm in the Inferno! TIA. Bryan * Bryan Hanson Professor of Chemistry Biochemistry DePauw University, Greencastle IN USA sessionInfo() R version 2.12.0 (2010-10-15) Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit) locale: [1] en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8 attached base packages: [1] splines datasets tools grid grDevices graphics utils stats [9] methods base other attached packages: [1] survival_2.35-8 gridExtra_0.7 GGally_0.2.2 xtable_1.5-6 [5] mvbutils_2.5.1 ggplot2_0.8.8 proto_0.3-8 reshape_0.8.3 [9] ChemoSpec_1.46 seriation_1.0-2 colorspace_1.0-1 TSP_1.0-1 [13] R.utils_1.5.3 R.oo_1.7.4 R.methodsS3_1.2.1 rgl_0.92.794 [17] lattice_0.19-13 mvoutlier_1.4 plyr_1.2.1 RColorBrewer_1.0-2 [21] chemometrics_1.0 som_0.3-5 robustbase_0.5-0-1 rpart_3.1-46 [25] pls_2.1-0 pcaPP_1.8-3 mvtnorm_0.9-92 nnet_7.3-1 [29] mclust_3.4.6 MASS_7.3-8 lars_0.9-7 gclus_1.3 [33] cluster_1.13.1 e1071_1.5-24 class_7.3-2 __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Michael Sumner Institute for Marine and Antarctic Studies, University of Tasmania Hobart, Australia e-mail: mdsum...@gmail.com __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Replacing several rows of a matrix at once
Hi Bryan, The reason vec gets recycled is that you are replacing more values than vec has. Just look at: tmp[p, ] this is 3 x 10 matrix, which you are trying to replace with a vector of length 10. If you want the replacement to occur without any recycling, you'll need to make vec be a matrix itself or at least a vector of length 30 (i.e., 3 * 10). Or do you want it recycled but in a different way than it is currently being recycled? (see Michael's response for that). Cheers, Josh On Sun, Nov 28, 2010 at 7:53 PM, Bryan Hanson han...@depauw.edu wrote: Hello Folks. This must be a silly question with a (not) obvious (to me) answer. Consider this: tmp - matrix(1:200, nrow = 20) vec - 300:309 tmp[9,] - vec # replacing one row works fine p - c(3, 11, 17) tmp[p,] - vec # replacing multple rows pastes the values down a column and recycles vec. What I want to do is replace multiple rows simultaneously at once. I suppose I can write a function, but this seems pretty fundamental so I feel I must be missing some obvious alternative. I'm feeling like I'm in the Inferno! TIA. Bryan * Bryan Hanson Professor of Chemistry Biochemistry DePauw University, Greencastle IN USA sessionInfo() R version 2.12.0 (2010-10-15) Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit) locale: [1] en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8 attached base packages: [1] splines datasets tools grid grDevices graphics utils stats [9] methods base other attached packages: [1] survival_2.35-8 gridExtra_0.7 GGally_0.2.2 xtable_1.5-6 [5] mvbutils_2.5.1 ggplot2_0.8.8 proto_0.3-8 reshape_0.8.3 [9] ChemoSpec_1.46 seriation_1.0-2 colorspace_1.0-1 TSP_1.0-1 [13] R.utils_1.5.3 R.oo_1.7.4 R.methodsS3_1.2.1 rgl_0.92.794 [17] lattice_0.19-13 mvoutlier_1.4 plyr_1.2.1 RColorBrewer_1.0-2 [21] chemometrics_1.0 som_0.3-5 robustbase_0.5-0-1 rpart_3.1-46 [25] pls_2.1-0 pcaPP_1.8-3 mvtnorm_0.9-92 nnet_7.3-1 [29] mclust_3.4.6 MASS_7.3-8 lars_0.9-7 gclus_1.3 [33] cluster_1.13.1 e1071_1.5-24 class_7.3-2 __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Joshua Wiley Ph.D. Student, Health Psychology University of California, Los Angeles http://www.joshuawiley.com/ __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] How do I subtract sequential values ?
On Sun, Nov 28, 2010 at 7:58 PM, Peter Ehlers ehl...@ucalgary.ca wrote: Then, since this is R, here's the next step: v - sample(50, 100, replace = TRUE) result - diff(v) / v[-length(v)] Very nice! It did not even occur to me to use diff() in this case, though that is exactly what is needed and I've used it a hundred times in other situations (I hope I'm like wine and get better with age or) Josh Peter Ehlers __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Replacing several rows of a matrix at once
On 2010-11-28 19:53, Bryan Hanson wrote: Hello Folks. This must be a silly question with a (not) obvious (to me) answer. Consider this: tmp- matrix(1:200, nrow = 20) vec- 300:309 tmp[9,]- vec # replacing one row works fine p- c(3, 11, 17) tmp[p,]- vec # replacing multple rows pastes the values down a column and recycles vec. What I want to do is replace multiple rows simultaneously at once. I suppose I can write a function, but this seems pretty fundamental so I feel I must be missing some obvious alternative. I'm feeling like I'm in the Inferno! Since matrices in R use column-major order, transpose first: ttmp - t(tmp) ttmp[, p] - vec (ans - t(ttmp)) Peter Ehlers TIA. Bryan * Bryan Hanson Professor of Chemistry Biochemistry DePauw University, Greencastle IN USA sessionInfo() R version 2.12.0 (2010-10-15) Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit) locale: [1] en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8 attached base packages: [1] splines datasets tools grid grDevices graphics utils stats [9] methods base other attached packages: [1] survival_2.35-8gridExtra_0.7 GGally_0.2.2 xtable_1.5-6 [5] mvbutils_2.5.1 ggplot2_0.8.8 proto_0.3-8reshape_0.8.3 [9] ChemoSpec_1.46 seriation_1.0-2colorspace_1.0-1 TSP_1.0-1 [13] R.utils_1.5.3 R.oo_1.7.4 R.methodsS3_1.2.1 rgl_0.92.794 [17] lattice_0.19-13mvoutlier_1.4 plyr_1.2.1 RColorBrewer_1.0-2 [21] chemometrics_1.0 som_0.3-5 robustbase_0.5-0-1 rpart_3.1-46 [25] pls_2.1-0 pcaPP_1.8-3mvtnorm_0.9-92 nnet_7.3-1 [29] mclust_3.4.6 MASS_7.3-8 lars_0.9-7 gclus_1.3 [33] cluster_1.13.1 e1071_1.5-24 class_7.3-2 __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Replacing several rows of a matrix at once
Thanks to Michael, Josh and Jorge - Problem fixed. Michael's suggestion was what I needed, but I wouldn't have ever conceptualized it that way, and Jorge showed me how simple the function could be (at this hour, I was imagining it would be more work). Thanks guys. Bryan On 11/28/10 11:03 PM, Michael Sumner mdsum...@gmail.com wrote: vec is being recycled column wise, so you can repeat each element the required number of times: tmp[p,] - rep(vec, each = length(p)) There's many ways to achieve this though, so it depends on what other variations you might want to deal with. Cheers, Mike. On Mon, Nov 29, 2010 at 2:53 PM, Bryan Hanson han...@depauw.edu wrote: Hello Folks. This must be a silly question with a (not) obvious (to me) answer. Consider this: tmp - matrix(1:200, nrow = 20) vec - 300:309 tmp[9,] - vec # replacing one row works fine p - c(3, 11, 17) tmp[p,] - vec # replacing multple rows pastes the values down a column and recycles vec. What I want to do is replace multiple rows simultaneously at once. I suppose I can write a function, but this seems pretty fundamental so I feel I must be missing some obvious alternative. I'm feeling like I'm in the Inferno! TIA. Bryan * Bryan Hanson Professor of Chemistry Biochemistry DePauw University, Greencastle IN USA sessionInfo() R version 2.12.0 (2010-10-15) Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit) locale: [1] en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8 attached base packages: [1] splines datasets tools grid grDevices graphics utils stats [9] methods base other attached packages: [1] survival_2.35-8 gridExtra_0.7 GGally_0.2.2 xtable_1.5-6 [5] mvbutils_2.5.1 ggplot2_0.8.8 proto_0.3-8 reshape_0.8.3 [9] ChemoSpec_1.46 seriation_1.0-2 colorspace_1.0-1 TSP_1.0-1 [13] R.utils_1.5.3 R.oo_1.7.4 R.methodsS3_1.2.1 rgl_0.92.794 [17] lattice_0.19-13 mvoutlier_1.4 plyr_1.2.1 RColorBrewer_1.0-2 [21] chemometrics_1.0 som_0.3-5 robustbase_0.5-0-1 rpart_3.1-46 [25] pls_2.1-0 pcaPP_1.8-3 mvtnorm_0.9-92 nnet_7.3-1 [29] mclust_3.4.6 MASS_7.3-8 lars_0.9-7 gclus_1.3 [33] cluster_1.13.1 e1071_1.5-24 class_7.3-2 __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Where is gdata?
On Sun, Nov 28, 2010 at 11:54 AM, Spencer Graves spencer.gra...@structuremonitoring.com wrote: Hello, All: Prof. Ripley suggested I remove RTools/perl from my path. I did that leaving Strawberry perl. Then everything seemed to work appropriately. 1. If you have the Rtools perl prior to any other perl on your path then it does not use your path to find perl but rather it checks which perl executable is associated with the .pl extension on your machine and uses that. Thus it should not be necessary to remove rtools from your path if you have pl associated with perl. 2. If you have multiple versions of perl installed and you want read.xls to use one which is not first on your path and you don't want to change your system configuration you can use the perl= argument to installXLSXsupport and to read.xls to specify the path to the perl.exe that you do want to use. That being said its best not to have Rtools on your path, not only because of its version of perl but also because it puts a find command on your path which overrides Windows' own find command. There is an Rtools.bat command at http://batchtools.googlecode.com that will temporarily put Rtools on your path in the current Windows console session only so that you can normally keep it off your path and only put it on your path in console sessions that need it. You simply run it without arguments, e.g. Rtools Rcmd build mypackage etc. -- Statistics Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.com __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Array help
On Nov 28, 2010, at 10:56 PM, bfhancock wrote: Josh, the data set is called StatTemps and is in the PASWR package. I want to make an array that involves only the 8 a.m. and a separate array that involves only the 9 a.m. so i can get info on the temperatures in those groups. So I still want it in the format of StatTemps but in two arrays that are based on 8 a.m. or 9 a.m.I have been messing with this for a while. And no it's not homework, I am just trying to learn R so I am more appealing out in the field eventually. They book I am using is confusing! Hopefully what I am trying to do isn't confusing. I want to do an array that holds the info from 1:6 12:22 for 8am and then 7:11 23:34 for 9am. I was able easily make two arrays based on sex by just putting in StatTemps[1:11,,] StatTemps[12:34,,] and assumed I could just go StatTemps[1:612:22,,] and StatTemps[7:1123:34,,] but that didn't work. Any ideas? Thanks so much! It may not be an array (since time values don't play very well with that data structure.) If there is time as an index, it may be a more complex object such as a time-series or zoo. Check with str(). -- David Winsemius, MD West Hartford, CT __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] formulas with non-syntactic names and an Error() term
## This is an example where ``-quoted non-syntactic names work in ## simple formulas, but not in formulas with an Error() term. ## Is this intentional or an oversight when ``-quoted names were added? tmp - data.frame(y=1:6, `x^1`=factor(c(1,2,1,2,1,2)), `x^2`=factor(c(1,1,2,2,3,3)), check.names=FALSE) tmp aov(y ~ `x^1` + `x^2`, data=tmp) ## ok aov(y ~ `x^1` + `x^2` + Error(1), data=tmp) ## error ## Error in `[.data.frame`(mf, xvars) : undefined columns selected tmp2 - data.frame(tmp) tmp2 aov(y ~ x.1 + x.2 + Error(1), data=tmp2) ## this is ok ## this is Windows R-2.12.0 ## Rich [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] How do I subtract sequential values ?
On 29 November 2010 15:09, Joshua Wiley jwiley.ps...@gmail.com wrote: (I hope I'm like wine and get better with age or) Sigh, me too - but I suspect I'm heading more towards vinegar Michael __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Where is gdata?
Hi Spencer,
I don't have RTools installed. Therefore I can't find RTools/perl
library(RTools)
Error in library(RTools) : there is no package called 'RTools'
library(Ecdat)
no complaint
data()
The datasets on Ecdat are added to the big list.
However
data(package='Ecdat')
displays the datasets list of Ecdat
B.R.
Stephen L
From: Spencer Graves spencer.gra...@structuremonitoring.com
Sent: Mon, November 29, 2010 11:33:12 AM
Subject: Re: [R] Where is gdata?
Hi, Stephen:
What operating system do you have? From the path you cite, I
assume you are using some version of Windows.
Wikipedia on perl says there are two primary version of perl
for Windows Strawberry perl, which is free, open source, and
ActivePerl, which is free but not open source. I've been using
Strawberry perl without any apparent problems due to the version. When
I removed ~Rtools/perl from my path, it still had Strawberry perl, and
'installXLSXsupport()' worked with my installation of Strawberry perl,
when it had not worked with ~Rtools/perl. You can download Strawberry
perl from http://strawberryperl.com;. However,
RSiteSearch('strawberry perl') produced 0 matches, while
RSiteSearch(ActivePerl) returned 2 matches and RSiteSearch(Active
Perl) found 10 matches.
After downloading and installing one of these, if
'installXLSXsupport()' still does not work, you need to check the path:
If 'installXLSXsupport()' does not work with Strawberry perl as the
first perl in your path, then you may need to install an appropriate
package from CPAN. More than that, I cannot answer. However, if you
download and install one of these two versions of perl and still have
the problem, please report what you've done and they symptoms you get to
this list. Also, please include sessionInfo() with your reply.
Hope this helps.
Spencer
On 11/28/2010 6:38 PM, Stephen Liu wrote:
Hi Spencer,
Win 7
I can't find the folders RTools\perl
perl is on C:\Users\satimis\My Document\R\win-library\2.12\gdata\perl
Nor I can find the folder Strawberry perl. Can you help? TIA
B.R.
Stephen L
From: Spencer Gravesspencer.gra...@structuremonitoring.com
Sent: Mon, November 29, 2010 12:58:25 AM
Subject: Re: [R] Where is gdata?
Hi, Stephen: Have you solved the problem yet? If no, see below. Spencer
###
Hello, All:
Prof. Ripley suggested I remove RTools/perl from my path. I did
that leaving Strawberry perl. Then everything seemed to work appropriately.
Thanks to all.
Spencer
On 11/28/2010 7:49 AM, Gabor Grothendieck wrote:
On Sun, Nov 28, 2010 at 10:40 AM, Spencer Graves
spencer.gra...@structuremonitoring.com wrote:
I tried install.packages('gregmisc'), which Stephen said he had.
Then help(pac=gdata) seemed to work normally. However, when I then
tried library(gdata), I got an error message from the the operating
system, saying perl.exe has stopped working. I cancelled past that and
got a message gdata: Unable to load perl libaries needed by read.xls() ...
Run the function 'installXLSXsupport()'. I tried 'installXLSXsupport()'
and again perl stopped working. I quit R and tried
install.packages('gdata') again, and it killed perl again.
Before installing 'gregmisc', I had tried install.packages('gdata')
by
itself. That seemed to work. Then I manually removed it and tried
'gregmisc', as Stephen had, and got problems I don't know how to solve.
???
Thanks,
Spencer
##
library(gdata)
gdata: Unable to load perl libaries needed by read.xls()
gdata: to support 'XLX' (Excel 97-2004) files.
gdata: Unable to load perl libaries needed by read.xls()
gdata: to support 'XLSX' (Excel 2007+) files.
gdata: Run the function 'installXLSXsupport()'
gdata: to automatically download and install the perl
gdata: libaries needed to support Excel XLS and XLSX formats.
Read ?installXLSXsupport
--
Spencer Graves, PE, PhD
President and Chief Operating Officer
Structure Inspection and Monitoring, Inc.
751 Emerson Ct.
San José, CA 95126
ph: 408-655-4567
[[alternative HTML version deleted]]
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] Where is gdata?
Hi, Stephen:
RTools is not a standard R package. It is a collection of
software tools for building R packages. If you use R much, I highly
recommend you learn about R package development, because I believe doing
so can increase your software development productivity.
However, for this, you do NOT need RTools. For now, please
ignore RTools, and install either Strawberry perl or ActivePerl. I
suggest you go to http://strawberryperl.com
http://strawberryperl.com/ and click on Download Strawberry Perl
5.12.1.0. This is the version I have. Then do the obvious things to
install it. If it fixed your problem, great. Otherwise, please report
to this list what you've tried, the error you got, and sessionInfo().
Hope this helps.
Spencer
On 11/28/2010 8:49 PM, Stephen Liu wrote:
Hi Spencer,
I don't have RTools installed. Therefore I can't find RTools/perl
library(RTools)
Error in library(RTools) : there is no package called 'RTools'
library(Ecdat)
no complaint
data()
The datasets on Ecdat are added to the big list.
However
data(package='Ecdat')
displays the datasets list of Ecdat
B.R.
Stephen L
From: Spencer Gravesspencer.gra...@structuremonitoring.com
To: Stephen Liusati...@yahoo.com; r-helpr-help@r-project.org
Sent: Mon, November 29, 2010 11:33:12 AM
Subject: Re: [R] Where is gdata?
Hi, Stephen:
What operating system do you have? From the path you cite, I
assume you are using some version of Windows.
Wikipedia on perl says there are two primary version of perl
for Windows Strawberry perl, which is free, open source, and
ActivePerl, which is free but not open source. I've been using
Strawberry perl without any apparent problems due to the version. When
I removed ~Rtools/perl from my path, it still had Strawberry perl, and
'installXLSXsupport()' worked with my installation of Strawberry perl,
when it had not worked with ~Rtools/perl. You can download Strawberry
perl from http://strawberryperl.com;. However,
RSiteSearch('strawberry perl') produced 0 matches, while
RSiteSearch(ActivePerl) returned 2 matches and RSiteSearch(Active
Perl) found 10 matches.
After downloading and installing one of these, if
'installXLSXsupport()' still does not work, you need to check the path:
If 'installXLSXsupport()' does not work with Strawberry perl as the
first perl in your path, then you may need to install an appropriate
package from CPAN. More than that, I cannot answer. However, if you
download and install one of these two versions of perl and still have
the problem, please report what you've done and they symptoms you get to
this list. Also, please include sessionInfo() with your reply.
Hope this helps.
Spencer
On 11/28/2010 6:38 PM, Stephen Liu wrote:
Hi Spencer,
Win 7
I can't find the folders RTools\perl
perl is on C:\Users\satimis\My Document\R\win-library\2.12\gdata\perl
Nor I can find the folder Strawberry perl. Can you help? TIA
B.R.
Stephen L
From: Spencer Gravesspencer.gra...@structuremonitoring.com
To: Stephen Liusati...@yahoo.com
Sent: Mon, November 29, 2010 12:58:25 AM
Subject: Re: [R] Where is gdata?
Hi, Stephen: Have you solved the problem yet? If no, see below. Spencer
###
Hello, All:
Prof. Ripley suggested I remove RTools/perl from my path. I did
that leaving Strawberry perl. Then everything seemed to work appropriately.
Thanks to all.
Spencer
On 11/28/2010 7:49 AM, Gabor Grothendieck wrote:
On Sun, Nov 28, 2010 at 10:40 AM, Spencer Graves
spencer.gra...@structuremonitoring.comwrote:
I tried install.packages('gregmisc'), which Stephen said he had.
Then help(pac=gdata) seemed to work normally. However, when I then
tried library(gdata), I got an error message from the the operating
system, saying perl.exe has stopped working. I cancelled past that and
got a message gdata: Unable to load perl libaries needed by read.xls() ...
Run the function 'installXLSXsupport()'. I tried 'installXLSXsupport()'
and again perl stopped working. I quit R and tried
install.packages('gdata') again, and it killed perl again.
Before installing 'gregmisc', I had tried install.packages('gdata')
by
itself. That seemed to work. Then I manually removed it and tried
'gregmisc', as Stephen had, and got problems I don't know how to solve.
???
Thanks,
Spencer
##
library(gdata)
gdata: Unable to load perl libaries needed by read.xls()
gdata: to support 'XLX' (Excel 97-2004) files.
gdata: Unable to load perl libaries needed by read.xls()
gdata: to support 'XLSX' (Excel 2007+) files.
gdata: Run the function 'installXLSXsupport()'
gdata: to automatically download and install the perl
gdata: libaries needed to support
Re: [R] Where is gdata?
On Sun, Nov 28, 2010 at 11:49 PM, Stephen Liu sati...@yahoo.com wrote: Hi Spencer, I don't have RTools installed. Therefore I can't find RTools/perl library(RTools) Error in library(RTools) : there is no package called 'RTools' Rtools is not an R package. Its a collection of UNIX-like windows software and other software such as perl. It is used by R package authors to supply the additional tools that are needed on Windows to build R packages from source. If you don't need to build R packages (that is you are content to use the Windows binaries) then you don't need Rtools. Also I don't think this or my other comments have anything to do with your problem. My comments were primarily in response to Spencer's comments. Regarding your question about gdata, 1. if gdata did not get installed then just do this from within R: install.packages(gdata) (or use the Packages | Install Package(s) menu to accomplish same). If that still does not result in gdata being installed then try a different mirror. 2. there is no gdata() function in the gdata package so your line which tries to call it would be expected to return an error even if gdata were present. -- Statistics Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.com __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Where is gdata?
On Mon, Nov 29, 2010 at 12:06 AM, Gabor Grothendieck ggrothendi...@gmail.com wrote: Regarding your question about gdata, 1. if gdata did not get installed then just do this from within R: install.packages(gdata) (or use the Packages | Install Package(s) menu to accomplish same). If that still does not result in gdata being installed then try a different mirror. 2. there is no gdata() function in the gdata package so your line which tries to call it would be expected to return an error even if gdata were present. 3. If you are not sure whether or not you have gdata installed try: library(gdata) If that works (i.e. you get no error message) then you have gdata installed and you can get help like this: library(help = gdata) and for each topic listed you can get help like this: ?read.xls and so on. -- Statistics Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.com __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Where is gdata?
Hi Gabor, library(gdata) no complaint library(help = gdata) It works. Thanks ?read.xls I must run ??read.xls All the topics I tested must use ??topic_name B.R. Stephen L From: Gabor Grothendieck ggrothendi...@gmail.com Cc: Spencer Graves spencer.gra...@structuremonitoring.com; r-help r-help@r-project.org Sent: Mon, November 29, 2010 1:16:35 PM Subject: Re: [R] Where is gdata? On Mon, Nov 29, 2010 at 12:06 AM, Gabor Grothendieck ggrothendi...@gmail.com wrote: Regarding your question about gdata, 1. if gdata did not get installed then just do this from within R: install.packages(gdata) (or use the Packages | Install Package(s) menu to accomplish same). If that still does not result in gdata being installed then try a different mirror. 2. there is no gdata() function in the gdata package so your line which tries to call it would be expected to return an error even if gdata were present. 3. If you are not sure whether or not you have gdata installed try: library(gdata) If that works (i.e. you get no error message) then you have gdata installed and you can get help like this: library(help = gdata) and for each topic listed you can get help like this: ?read.xls and so on. -- Statistics Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.com [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Where is gdata?
On Mon, Nov 29, 2010 at 7:01 AM, Stephen Liu sati...@yahoo.com wrote: ?read.xls I must run ??read.xls Not if you library(gdata) first. Then ?read.xls should work. Regards Liviu __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Where is gdata?
Hi, Liviu: Doesn't he need a version of perl installed with a particular perl package for read.xls to work properly? Spencer On 11/28/2010 10:40 PM, Liviu Andronic wrote: On Mon, Nov 29, 2010 at 7:01 AM, Stephen Liusati...@yahoo.com wrote: ?read.xls I must run ??read.xls Not if you library(gdata) first. Then ?read.xls should work. Regards Liviu __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Spencer Graves, PE, PhD President and Chief Operating Officer Structure Inspection and Monitoring, Inc. 751 Emerson Ct. San José, CA 95126 ph: 408-655-4567 __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Comparing two functions
It is perhaps worth mentioning in this context that in the R language,
functions and language components (like formulas, expressions, etc.)
are full first class objects -- which means basically that they can be
treated like any data object: e.g. passed as arguments to a function,
returned as values of a function, etc.
So, for example, Gabor's suggestion to pass the function as the
argument of your master function is a common R construct that
returns the values computed by the function you passed as an argument.
But you could also do it this way:
masterf - function(rng=c(norm,unif))
{
rng - match.arg(rng)
switch(rng,
norm = rnormlra,
unif = runiflra
)
}
Note that the return object is the function matching the possibly
abbreviated argument name (courtesy of match.arg()), _not_ the value
of the function. So this function could be called as, e.g.
masterf(n)(n=100, mean=10)
To be sure, this is a silly and cumbersome way to do things
here.Gabor's solution is what you want I think.** But this kind of
approach can be very handy in certain circumstances and does give you
some sense of what can be done in R that may be unfamiliar to those
used to procedural languages like C or Fortran (or Java?).
Cheers,
Bert Gunter
Genentech Nonclinical Statistics
** His approach also has the advantage of explicitly passing the
function you want to masterf rather than forcing R to look for it (in
the environment in which masterf was defined). More typically, the
function would actually be defined within masterf using the arguments
passed to masterf. But that's another story (scoping).
On Sun, Nov 28, 2010 at 4:58 AM, Gabor Grothendieck
ggrothendi...@gmail.com wrote:
On Sun, Nov 28, 2010 at 5:53 AM, Ira Sharenow irasharenow...@yahoo.com
wrote:
Hi. I am new to R and facing a problem that I cannot solve.
I am writing some basic functions. Then I would like to have a master
function that allows me to call one of the functions which I created, but I
cannot figure out how to do so.
Below is an example. The functions rnormIra and runifIra both seem to work
fine. I do not get an error message when entering the definition of the
master function randomIra; however, it fails when I use it to call another
function.
rnormIra = function(n, mean) {
return(rnorm(n,mean,1))
}
rnormIra(10,100) #works fine
runifIra = function(n,min,max) {
return(runif(n,min,max))
}
runifIra(5,20,30) #works fine
randomIra = function(f, ...) {
if(f == rnormIra) {
return(rnormIra(n,mean))
}
else {
return(runifIra(n,min,max))
}
} #no error messages
randomIra(rnormIra, n = 5, mean = 20) #FAILS
randomIra(runifIra, n = 5, min = 10, max = 25) #FAILS
do.call(randomIra,list(rnormIra,5,20)) #FAILS
Try this:
randomIra - function(f, ...) if (identical(f, rnormIra))
rnormIra(...) else runifIra(...)
--
Statistics Software Consulting
GKX Group, GKX Associates Inc.
tel: 1-877-GKX-GROUP
email: ggrothendieck at gmail.com
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] Where is gdata?
Dear Spencer On Mon, Nov 29, 2010 at 8:05 AM, Spencer Graves spencer.gra...@structuremonitoring.com wrote: Doesn't he need a version of perl installed with a particular perl package for read.xls to work properly? I really don't know. I assume that, if the package was installed and could be loaded, the object 'read.xls' would be present in the environment along with the associated ?read.xls help page. It felt as if the original poster failed to load the package before trying to access the help pages. The question didn't pertain to the actual functionality of read.xls(). Best regards Liviu Spencer On 11/28/2010 10:40 PM, Liviu Andronic wrote: On Mon, Nov 29, 2010 at 7:01 AM, Stephen Liusati...@yahoo.com wrote: ?read.xls I must run ??read.xls Not if you library(gdata) first. Then ?read.xls should work. Regards Liviu __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Spencer Graves, PE, PhD President and Chief Operating Officer Structure Inspection and Monitoring, Inc. 751 Emerson Ct. San José, CA 95126 ph: 408-655-4567 -- Do you know how to read? http://www.alienetworks.com/srtest.cfm http://goodies.xfce.org/projects/applications/xfce4-dict#speed-reader Do you know how to write? http://garbl.home.comcast.net/~garbl/stylemanual/e.htm#e-mail __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
