[R] integers to POSIXct
What is the recommended way to convert/coerce and integer to a POSIXct please? d - as.POSIXct(Sys.Date()) i - as.integer(d) as.POSIXct(i) Error in as.POSIXct.default(i) : do not know how to convert 'i' to class POSIXlt This appears to be the behaviour in 2.3.1 and 2.4.0 on windows XP. I have tried searching on this and found as.Date.integer in package zoo which performs a similar function but wondered if there was something basic I was missing in the base distribution? cheers __ R-help@stat.math.ethz.ch 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] more on date conversion differences in 2.2.1 vs 2.3.1
With dates I get different results with 2.2.1 and 2.3.1. From my
somewhat naive point point of view, the 2.2.1 behaviour seems more sensible.
Running the code below in 2.2.1:
V1
2006-08-01 2006-08-01
1 1
With 2.3.1 I get:
V1
1154354400 1154440800
1 1
# testdate.R
t - read.csv2('testdate.csv', header=FALSE)
t$V1 - as.POSIXct(t$V1)
print(t)
x - xtabs(V2 ~ V1, data=t)
print(x)
# testdate.csv
2006-8-1;0;1
2006-8-1;1;1
2006-8-2;0;1
2006-8-2;0;0
2006-8-2;1;1
__
R-help@stat.math.ethz.ch 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] multiple return values and optimization
I have a function (masheff) which returns a value which I can optimize no problem, eg: optimize(masheff, c(15,30), maximum=TRUE, m_gd=5.13, v_tot=41, e_c=1.0) I would like masheff() to return multiple values say as a list with named elements like so: v = masheff(...) v$eff v$extract etc Is there a simple way to do this in an optimize context or would I need to set some global variables and inspect them afterwards? __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] updated r-help traffic plots
I have updated some mail list traffic plots I created a while back however I wouldn't consider the data verified. The reply stats are from In-Reply-To headers. http://brewiki.org/tmp/r-help_traffic.png The data set is http://brewiki.org/tmp/r-help.zip __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] regular expressions, sub
There are some interactive regex tools around. I use a python one sometimes. You just then have to be careful re escaping and the style of regular expressions used in the tool you worked with and the target environment. Christian Hoffmann wrote: Hi, I am trying to use sub, regexpr on expressions like log(D) ~ log(N)+I(log(N)^2)+log(t) being a model specification. The aim is to produce: ln D ~ ln N + ln^2 N + ln t The variable names N, t may change, the number of terms too. I succeded only partially, help on regular expressions is hard to understand for me, examples on my case are rare. The help page on R-help for grep etc. and regular expressions __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] y axis text truncated
I have been trying to find which par settings can help me avoid truncated text at the bottom of the y axis in a mosaic plot (created when I plot a result of a 2d xtabs) without much success. Using las=1 has helped but the text (the 500+ level) is still cropped. I get the same result on XP/2.2.0 and FC4/2.2.1. Any tips would be appreciated. # dput(foo.df) foo.df = structure(list(vol1 = structure(c(1, 2, 3, 4, 5, 6, 1, 2, 3, 4, 5, 6, 1, 2, 3, 4, 5, 6, 1, 2, 3, 4, 5, 6, 1, 2, 3, 4, 5, 6 ), .Label = c(100, 101-250, 251-500, 501-750, 751-1000, 1000+), class = factor), vol2 = structure(c(1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5), .Label = c(20, 20-50, 50-100, 100-500, 500+), class = factor), Freq = c(4, 3, 0, 0, 2, 0, 4, 3, 6, 4, 1, 2, 1, 3, 3, 4, 5, 2, 3, 1, 3, 2, 2, 12, 0, 0, 1, 0, 2, 4)), .Names = c(vol1, vol2, Freq), row.names = c(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30), class = data.frame) xtabs(Freq ~ vol1 + vol2, data=foo.df) vol2 vol1 20 20-50 50-100 100-500 500+ 100 4 4 1 30 101-2503 3 3 10 251-5000 6 3 31 501-7500 4 4 20 751-1000 2 1 5 22 1000+ 0 2 2 124 plot(xtabs(Freq ~ vol1 + vol2, data=foo.df)) plot(xtabs(Freq ~ vol1 + vol2, data=foo.df), las=1) __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] Windows ESS for XEmacs - installer
I mentioned this on the ESS list a little while ago, I made an installer for ESS and XEmacs on Windows. It worked for me but given my minimal knowledege of ESS and XEmacs, it might not be the right way to do it and may or may not work for you. I hosted it and the source for the inno setup script at http://brewiki.org/XEmacsESS but would be only too pleased for it to move somewhere more appropriate and modifed as deemed necessary. cheers __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] Wikis etc.
Frank E Harrell Jr wrote: paul sorenson wrote: I am a fan of wiki's and I reckon it would really help with making R more accessible. On one extreme you have this email list and on the other extreme you have RNews and the PDF's on CRAN. A wiki might hit the spot between them and reduce the traffic on the email list. Thanks Paul. But as long as the email list is active I fear a wiki won't be. That would be sad if that were true. They are different beasts, as would be an IRC channel. I say complementary, not mutually exclusive. A wiki takes time to reach critical mass (eg my home brew wiki http://brewiki.org/ or wikipedia) and you couldn't just pull the plug on this list without a serious impact on the uptake of R I would have thought. Contributions to the wiki from mugs like me with less R/statistics experience would hopefully make R more accessible to newbies - pointing out the traps for new players. One way to bootstrap it is to simply add a wiki menu entry into the r-project.org menu. This is what the guys over at http://wiki.wxpython.org/ have done. Over time, some of the other items there might morph in to wiki pages as appropriate. I have no doubt that if the R-Wiki was supported in the same thoughtful, thorough and patient way in which questions on R-Help are answered, it would be one of the lowest entropy wiki's around. I have some experience with moinmoin (a python wiki) and would be willing to contribute some time and skills if that would help. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] Wikis etc.
I am a fan of wiki's and I reckon it would really help with making R more accessible. On one extreme you have this email list and on the other extreme you have RNews and the PDF's on CRAN. A wiki might hit the spot between them and reduce the traffic on the email list. Frank E Harrell Jr wrote: I feel that as long as people continue to provide help on r-help wikis will not be successful. I think we need to move to a central wiki or discussion board and to move away from e-mail. People are extremely helpful but e-mail seems to be to always be memory-less and messages get too long without factorization of old text. R-help is now too active and too many new users are asking questions asked dozens of times for e-mail to be effective. The wiki also needs to collect and organize example code, especially for data manipulation. I think that new users would profit immensely from a compendium of examples. Just my .02 Euros Frank __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] Error in X11(paste(png::, filename, sep = ), width, height, pointsize unable to start device PNG
Marc Schwartz wrote: ... On a side note, RH9 is a fairly dated and EOL'd distribution, with security updates and bug patches only provided by the Fedora Legacy folks (http://fedoralegacy.org). You should consider upgrading to Fedora in the near future (if you want to stay with RH), since the FL folks can drop support for RH9 at any time, leaving you vulnerable. Yes but also don't do this naively. You might find that gcc 4 breaks some of your source compilations and IIRC this is the default compiler if you install FC4 with the install everything option. I haven't tried compiling R with gcc 4, this is just a general comment. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] ESS and Emacs
I tried it with XEmacs on Win XP and I had to install ESS separately.
Mark Leeds wrote:
I have been using the document written by John Fox titled
Sn Introduction to ESS + XEmacs for Windows
Users of R.
It's a very nice document and
I went through it carefully but I got
an error when I finished it and launched XEmacs.
The error is cannot open load file : ess-site.
So, I did more investigation
and it seems like there is a folder
Program Files/XEmacs/xemacs-packages/etc/ess
that should have been created when
I downloaded XEmacs but it doesn't exist.
There is a folder called efs ( rather than ess ) but
I don't think that's it.
I tried installing XEmacs again but the
same thing happened.
Does anyone know anything about this ?
I am using Windows NT.
Thanks.
Mark
**
This email and any files transmitted with it are confidentia...{{dropped}}
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] date handling
d = as.POSIXlt(c(2005-07-01, 2005-07-02, 2005-07-03, 2005-07-04, 2005-07-05)) d$mon and d$year will get you part way there. That is assuming your dates are formated -mm-dd. strptime() might also be useful. Richard van Wingerden wrote: Hi, Given a frame with calendar date's: 2005-07-01, 2005-07-02,2005-07-03,2005-07-04,2005-07-05,etc. I want to extract the following from these dates: week number month number year number Any ideas how to accomplish this? Many thanks. Regards, Richard __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] how to draw continent boundry
Have you looked in the maps package? Yogesh K. Tiwari wrote: Hi, If I am ploting a world map like plot (lon,lat) then how to draw a continent boundry in that plot. What is the command... Many thanks Regards, Yogesh __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] R newbie...
Return something that can hold more than one value, eg:
calculate - function(x, y) {
list(a=x+y, b=x-y)
}
David Hajage wrote:
Thank you for your answer.
And what if my first function gives 2 results :
calculate - function(x,y)
{
a - x + y
b - x - y
}
How can I use both a and b in a new function ?
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] Plot
Apple Ho wrote: Hello, I have a problem about using the command plot. Suppose I have some points, and one of them is (0,0), how can I show the figure with this point which is at the corner? How close to the corner do you want it? plot(0, 0, xlim=c(0, 1), ylim=c(0,1)) you could also add: grid() __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] plotting question
Ed, I am no expert at R but if you follow the tips from the previous poster (eg type ?lines) and go to the very bottom of the help page there is an example that plots a line over some points. cheers Ed Wang wrote: Yes, I have gone through the manual. My best reference for plotting has been examples either through the list archive or searches on the internet. Nothing in the introductory manual could get me to what I have been able to do so far, but that is limited to plotting componenets of the time series returned from an STL call. This is why I am asking for example or references to examples from anyone who would be willing to share them. For some of us not very familiar with S+, etc. the documentation with R is not enough. While I can plot two time series one above another using the mfrow() function I'd prefer to put two time series in one plot in different colours and using two different symbols, which I cannot do using calls to plot(). Thanks. A man is not old until regrets take the place of dreams. Actor John Barrymore From: Berton Gunter [EMAIL PROTECTED] To: 'Ed Wang' [EMAIL PROTECTED], r-help@stat.math.ethz.ch Subject: RE: [R] plotting question Date: Mon, 5 Dec 2005 14:12:47 -0800 ?lines ?points An Introduction to R (and numerous other books on R) explains this. Have you read it? -- Bert Gunter Genentech Non-Clinical Statistics South San Francisco, CA The business of the statistician is to catalyze the scientific learning process. - George E. P. Box __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] What made us so popular Nov 16-20?
I had too much time on my hands on a sunday morning: For the hell of it I grepped my r-help date headers for the last month or two. I was looking for some corresponding increase in r-help traffic. The data is: http://brewiki.org/tmp/r-help_traffic.txt The traffic looks something like: http://brewiki.org/tmp/r-help_traffic.png I didn't take into account time zones for the plot (but I did plot the histogram of them). cheers Duncan Murdoch wrote: Our main US mirror is cran.mirrors.pair.com, AKA cran.us.r-project.org. Pair.com keeps statistics on traffic on the mirror sites, and I got all excited when I looked at this page: http://mirrors.pair.com/pair/stats.html and saw that CRAN was 5th most popular over the last month, getting more visitors than Apache, MySQL, OpenOffice, etc. Then I looked at this graph: http://mirrors.pair.com/freebsd/stats/cran-ip.png and saw that this is likely due to a huge spike in traffic between Nov 16 and 20. Our visitors (not sure of the exact definition) went from the usual 10K/day up to 50-150K/day during that week. Did we get mentioned somewhere (e.g. Slashdot), or was someone just experimenting with some automated downloading? Duncan Murdoch __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] how to subset rows using regular expression patterns
Something like
A[grep('^ab', as.vector(A$M)),]
might work
zhihua li wrote:
hi netters,
i have a dataframe A with several columns(variables). the elements of
column M are character strings. so
A$M=c(ab,abc,bcd,ac,abcd,fg,.fl).
i wanna extract all the rows where A$M match some regular expression
pattern.
for a simple example, let the pattern be just ab, i wanna subset the
rows where A$M=ab or abc or abcd or abXX.
i know i can write a loop,using some regular expression pattern
functions like grep row by row. but when A's size is pretty large, it's
inefficient. could anyone give me a hint about a faster code?
thanks a lot!
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] identifying strong clustering
I have 130 or so rows of questionnaire data. It is 67 columns wide mostly of categorical nature (and often yes/no). I have been using daisy, pam and plot to view cluster plots with subsets of columns. With different subsets, there is great variation in the degree of overlap of the clusterplot ellipses, which I assume indicates some measure of differentiation between clusters. Can anyone point me at forms of analysis which can help identify column subsets which yield high clustering (separation of ellipses?)? Sorry for the verbose description, there is probably a single word or phrase which describes what I would like to do. I just don't know it. Ultimately I am trying to identify distinct groups within the respondents and find what areas (columns) that define the groups. cheers __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] what is best for scripting?
As I get more familiar with R I tend to find the need for massaging data
with other scripts decreasing.
I still use python as a front end to some R tasks and it is a great
language to have in your personal arsenal (as is R).
The kind of decision making process for me goes something like:
o If R can read the data directly then use R. I am pleasantly
surprised at R in this regard.
o If Python (or other scripting tool) already has bindings for dataset
that you want, consider using Python. Eg I extract software development
metrics from Perforce with python for plotting in R.
o If the data set has a complex grammar, choose a tool with support for
grammar compilers (I use and recommend pyparsing but there are dozens of
choices). Actually I didn't check if there is a grammar compiler for R.
Someone mentioned BeautifulSoup not long ago for extracting stuff from
broken HTML. I have used this also with some success for extracting
deeply nested tables in poorly written HTML.
I usually dump data from Python to R in CSV format. I call R scripts
from Python and about the only trick I use here is to read in an R
script template and perform string variable expansion (interpolation in
Perl) before sending it to an R process. See attached for example. For
various reasons I have not used the R-Python bindings.
cheers
Molins, Jordi wrote:
I am using R in Windows. I see that I will have to use batch processes with
R. I will have to read and write text files, and run some R code; probably
some external code too. I have never done scripting. Is there any document
that explains simple steps with examples? I also have heard that Python is a
good scripting language. Is it worth the effort? (I do not have too much
free time, so if I could do without, much better ...).
Has anybody strong opinions on that? Past experiences?
Thank you!
Jordi
The information contained herein is confidential and is inte...{{dropped}}
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
#!/usr/bin/env python
# Executes an R script
# $Revision: 1.1 $
# paul sorenson oct 2003
CMD = '''/Program Files/R/rw2001/bin/rterm.exe --vanilla --slave'''
import logging
log = logging.getLogger('TT')
def RExec(RFile, params = None):
'''
Execute an R script - optionally interpolating dict style params.
Warning, R also accepts %0d style interpolation, if you want to pass
this to R then your original script must add an additional %.
Eg:
png(filename=c:/sosman/testtrack/web/tt%%02d.png, width=640)
This will get passed to R as:
png(filename=c:/sosman/testtrack/web/tt%02d.png, width=640)
if you pass in non null params to the function.
If params is not set then no interpolation will take place so raw
R scripts will pass through unchanged.
'''
import popen2
(r, w, e) = popen2.popen3(CMD)
rsrc = RFile.read() % params
log.debug(rsrc)
w.write(rsrc)
w.close()
err = e.read()
print err
e.close()
r.close()
def usage():
print 'usage: python R.py --r-script=R_script [--params=params]'
sys.exit(2)
if __name__ == __main__:
import sys, getopt
try:
opts, args = getopt.getopt(sys.argv[1:], p:r:, [params=,
r-script=])
except getopt.GetoptError:
usage()
scriptname = None
params = None
for opt, arg in opts:
if opt in ('-p', '--params'):
params = eval(arg)
elif opt in ('-r', '--r-script'):
scriptname = arg
if not scriptname:
usage()
print '# script: %s params: %s' % (scriptname, params)
r = file(scriptname, 'r')
RExec(r, params)
r.close()
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] calculating IRR (accounting) in R
paul sorenson wrote:
I can't seem to track down R functions to calculate Internal Rate of
Return and NPV?
Thanks for the answers people. Comparing the answers with what Excel
pops out shows just how assumptions can vary. In particular whether the
first payment is at T0 or T1.
cheers
# calculates NPV and IRR
# Assumes first cash flow is at time 0
npv1 - function(i, cf, tt = seq(along = cf)) sum(cf / (1+i)^tt)
# http://www.mathepi.com/comp/discounting.html
# Compute net present value of payments received at the
# beginning of each time interval given the discount.rate.
# Payment 0 happens at time 0 (not time 1).
npv - function(discount.rate, payments, nn=length(payments)) {
sum(payments * (1/(1+discount.rate))^(0:(nn-1)))
}
# Payment 0 happens at time 1 (not time 0).
npv1 - function(discount.rate, payments, nn=length(payments)) {
sum(payments * (1/(1+discount.rate))^(1:nn))
}
# npv function with optional zero shift
npv.s = function(discount.rate, payments, npv0=0, fn) {
fn(discount.rate, payments) - npv0
}
# Solve IRR
# npv must cross zero in the search range
irr = function(payments, npv0=0, fn=npv) {
uniroot(npv.s, c(0.0, 1), payments=payments, npv0=npv0, fn=fn)$root
}
# Plot npv for range of discount rates
# Can be used as diagnostic and to find range where npv crosses
# zero (requirement for uniroot).
p.npv = function(t, r=c(0,1), fn=npv) {
s = seq(r[1], r[2], (r[2]-r[1])/30)
plot(s, sapply(s, fn, t, simplify=TRUE), type='l',
xlab=discount rate, ylab=NPV, main=NPV vs discount rate
)
grid()
#abline(0, 0, col='blue')
}
# Annotate with IRR
p.irr = function(t, fn=npv) {
r = irr(t)
points(r, 0)
text(r, 0, sprintf('IRR = %2.2f%%', 100*r), pos=4, col='blue')
}
t = c(-8000, 100, 100, 100, 2000, 3000, 4000, 5000)
r = 0.1
npv(r, t)
#p.npv(t)
#p.npv(t, fn=npv1)
irr(t)
t2 = c(-8000, 9000, 7000, 6000, 4000)
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] calculating IRR (accounting) in R
I am trying to replace a spreadsheet model of a project justification with an R script. I can't seem to track down R functions to calculate Internal Rate of Return and NPV? Am I missing something? NPV doesn't seem so difficult to calculate (at least for a regular series) but I am struggling to identify how to solve for IRR in R. It would be sufficient if it worked for a regular series but really useful if there was something that worked with irregular time series. cheers __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] Fw: Re: Is there anything like a write.fwf() or possibility to print adata.frame without rownames?
If you are desperate, save the file as tab delimited and then use vi or some stream editor to convert the tabs to spaces. If you set the tab stop wide enough you should be able to guarantee uniform columns. Gorjanc Gregor wrote: Petr Pikal wrote: Hi did you tried something like write.table( tab, file.txt, sep=\t, row.names=F) which writes to tab separated file? Petr thanks, but I do not want a tab delimited file. I need spaces between columns. write.table( tab, file.txt, sep=, row.names=F) Can it do what you want? Ronggui thanks, but this does not work also. For example I get something like this bellow 26 1 42 DA DA lipa Monika 26 1 42 DA DA lipa Monika 27 1 41 DA DA smreka Monika 27 1 41 DA DA smreka Monika and you can see, that there is a problem, when all values in a column do not have the same length. I need to get 26 1 42 DA DA lipa Monika 26 1 42 DA DA lipa Monika 27 1 41 DA DA smreka Monika 27 1 41 DA DA smreka Monika i.e. columns should be properly aligned. Lep pozdrav / With regards, Gregor Gorjanc -- University of Ljubljana Biotechnical FacultyURI: http://www.bfro.uni-lj.si/MR/ggorjan Zootechnical Department mail: gregor.gorjanc at bfro.uni-lj.si Groblje 3 tel: +386 (0)1 72 17 861 SI-1230 Domzale fax: +386 (0)1 72 17 888 Slovenia, Europe -- One must learn by doing the thing; for though you think you know it, you have no certainty until you try. Sophocles ~ 450 B.C. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] PNG-import into R
Rajarshi Guha wrote: Right now it segfaults, so its not really useful yet. Can I use that as a tag line? __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] correlating irregular time series
I don't have the texts you mention but I get the general idea. The diagram I posted shows only a small fraction of the events I have. Thank you Christophe Pouzat wrote: Hi Paul, Here is how an amateur statistician deals with this problem when analyzing spike trains from simultaneously recorded neurons. Start by estimating the hazard function h(t) of your several point processes (if you have a copy of MASS, check out the chapter 13, If you have a copy of Jim Lindsey, The Statistical Analysis of Stochastic Processes in Time, check out chap 3 4; the hazard function is also called the conditional intensity or the stochastic intensity). In practice if you have a renewal process, meaning that the successive intervals between your events times are independent, you can first estimate the Inter Event Interval pdf, f(t), and its cumulative distribution function F(t). h(t) is then given by: h(t) = f(t) / (1-F(t)), where the quantity S(t) = 1-F(t) is often called the survivor function. Fine, now if your processes are well approximated by renewal processes, you can look for the distribution of time to next event (TTN) and time to former event (TTF). By that I mean that for each of the black events of your figure, you must get the interval separating it from the last red event preceding it (the time to former) and the next red event following it (the time to next). Under the null hypothesis of no correlation these to random variables have the same pdf given by: TTN(i) = S(i) / IEI, where S(i) in that case is the survivor function of the red (test) process and IEI is its inter event interval expected value. Using this approach I typically estimate the TTN and TTF pdfs with histograms and compare these histograms to their expected values under the null hypothesis. A warning though, I have most of the time much more events than you seem to have on your figure. Let me know if any of this makes sense. Christophe. paul sorenson wrote: I have some time stamped events that are supposed to be unrelated. I have plotted them and that assumption does not appear to be valid. http://metrak.com/tmp/sevents.png is a plot showing three sets of events over time. For the purpose of this exercise, the Y value is irrelevant. The series are not sampled at the same time and are not equispaced (just events in a log file). The plot is already pretty convincing but requires a human-in-the-loop to zoom in on hot areas and then visually interpret the result. I want to calculate some index of the events' temporal relationship. I think the question I am trying to ask is something like: If event B occurs, how likely is it that an event A occurred at almost the same time?. Can anyone suggest an established approach that could provide some further insight into this relationship? I can think of a fairly basic approach where I start out with the ecdf of the time differences but I am guessing I would be reinventing some wheel. Any tips would be most appreciated. cheers __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] correlating irregular time series
I have some time stamped events that are supposed to be unrelated. I have plotted them and that assumption does not appear to be valid. http://metrak.com/tmp/sevents.png is a plot showing three sets of events over time. For the purpose of this exercise, the Y value is irrelevant. The series are not sampled at the same time and are not equispaced (just events in a log file). The plot is already pretty convincing but requires a human-in-the-loop to zoom in on hot areas and then visually interpret the result. I want to calculate some index of the events' temporal relationship. I think the question I am trying to ask is something like: If event B occurs, how likely is it that an event A occurred at almost the same time?. Can anyone suggest an established approach that could provide some further insight into this relationship? I can think of a fairly basic approach where I start out with the ecdf of the time differences but I am guessing I would be reinventing some wheel. Any tips would be most appreciated. cheers __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] Command line and R
Angelo Secchi wrote: On Wed, 09 Nov 2005 12:25:37 - (GMT) (Ted Harding) [EMAIL PROTECTED] wrote: On 09-Nov-05 Roger Bivand wrote: On Wed, 9 Nov 2005, Angelo Secchi wrote: Hi, I wrote a small R script (delta.R) using commandArgs(). The script works from the shell in usual way R --no-save arg1 delta2.R Suppose arg1 is the output of another shell command (e.g. gawk, sed ...). Is there a way to tell R to read arg1 from the output of the previous command? Any other workaround? Use shell variables, possibly also Sys.getenv() within R as well as or instead of commandArgs(). If it's a fairly simple shell comand (and even if it isn't, though it could get tricky for complicated ones) you can use the backquote trick (called, in well-spoken circles, command substitution): R --no-save `shellcmd` delta2.R As in all shell command lines, wherever you have a command (including arguments etc.) between backquotes, as exemplified by `shellcmd` above, the output of the command (as sent to stdout) replaces `shellcmd` in the command-line. This could be a lot of stuff (depending on what shellcmd is), or just one value, or whatever. ... and this behaviour is OS (or at least command shell specific) for anyone trying this on Windows and wondering why it doesn't work. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] Quickest way to match two vectors besides %in%?
Pete Cap wrote:
Hello list,
I have two data frames, X (48469,2) and Y (79771,5).
X[,1] contains distinct values of Y[,2].
I want to match values in X[,1] and Y[,2], then take
the corresponding value in [X,2] and place it in
Y[,4].
So far I have been doing it like so:
for(i in 1:48469) {
y[which(x[i,1]==y[,3]),4]-x[i,2]
}
I'm not sure but isn't that a case where merge() can help?
cheers
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] brewing stats
I guess this isn't so much of a help request as a show-and-tell from a
non-statistician homebrewer who has been fumbling around with R. If
nothing else it provides yet another data set. I hope it is not out of
line.
Anyway, the plots I have produced are at
http://brewiki.org/BatchSparge#poll
The polling method is somewhat simple, its just one of those multiple
choice style polls you can create on various web forums.
The poll was prompted by the ongoing claim from fly spargers that
their method is more efficient, but I had never seen data to support
that. I thought maybe it was a bit of snobbery.
Maybe they are right. However if I conveniently ignore that annoying
bump on the left of the batch sparge histogram then the two groups start
to look very similar.
I was going to go out on a limb and say I learn heaps from reading the
posts here so please don't ruin my delusion too much if my output
violates all principles of good statistics. OTOH if you can suggest
other cool looking graphs please feel free. The more difficult to
pronounce the names are, the better :-)
The data set is (efficiency is the low end of its bin):
method efficiency count source
fly 95 0 bb
fly 90 0 bb
fly 85 2 bb
fly 80 8 bb
fly 75 13 bb
fly 70 8 bb
fly 65 3 bb
fly 60 0 bb
fly 55 0 bb
batch 95 0 bb
batch 90 0 bb
batch 85 4 bb
batch 80 3 bb
batch 75 15 bb
batch 70 10 bb
batch 65 6 bb
batch 60 7 bb
batch 55 1 bb
And the R code:
# Crunch some stuff with brewboard (and similar polls).
# Data is already tabulated.
x = read.csv(SpargeEff.csv)
# Shift value to centre of bin
x$efficiency = x$efficiency + 2.5
# Ignore rows with no votes (NA), zeros are ok though
y = x[which(!is.na(x$count)),]
r = rep(row.names(y), y$count)
z = y[r,]
z$count = 1
par(mfrow=c(2,2))
barplot(table(z$method), main=number of responses)
barplot(table(z$method, z$efficiency), beside=T, legend=T, main=Mash
efficiency by method, sub=paul sorenson 2005 brewiki.org)
boxplot(z$efficiency ~ z$method, main=Mash efficiency)
z.h = hist(z$efficiency, prob=T, main=Efficiencies,\n all methods
combined, xlab=efficiency)
z.md = max(z.h$density)
lines(density(z$efficiency, bw=3.0), col='blue')
#qqnorm(x$efficiency)
t.test(efficiency ~ method, data=z)
#by(z, z$method, summary)
zs = split(z, z$method)
summary(zs$batch)
summary(zs$fly)
# fit a normal distribution
require(MASS)
z.fit = fitdistr(z$efficiency, 'normal')
q = 55:95 + 2.5
lines(q, dnorm(q, z.fit$estimate['mean'], z.fit$estimate['sd']), col='red')
legend('topleft', legend=c('density', 'fitted'), col=c('blue', 'red'),
lwd=1, inset=0.05)
# Factor out lowball values.
z.f = z[which(z$efficiency = 65),]
by(z.f, z.f$method, summary)
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] dyn.load a f90 module.
Bo Peng wrote:
Dear list,
Has there been any success in loading modules written in f90? I tried
% ifort -c myfile.f90
% R CMD SHLIB myfile.o
% R
dyn.load('myfile.so')
.Fortran('myfile')
I used intel (free) fortran compiler under linux. All commands run
successfully except that function myfile is not loaded. (Is there a
function/tool to list symbols in a .so file?)
If there are symbols present then unix 'nm' should show them to you.
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] read data from pdf file
Marco Venanzi wrote: Hi, I'm trying to read data from a PDF file.Is it possible to do it with R? Thanks, Marco [[alternative HTML version deleted]] Ghostview has at least one method for extracting the text from a PDF document. In particular Text|Extract allows you to select pages for extraction. This may or may not give the same result as pdftotext because I think that is ghostscript based. Your mileage may vary when extracting tables from a PDF. cheers __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] sqlQuery and string selection
Jérôme Lemaître wrote: Dear alls, Could someone tell me how to select a subset of string observations (e.g. females in a sex column) with sqlQuery in the RODBC library? Indeed, I'm trying to select a subset of observations on my access database with: female-sqlQuery(mychannel,SELECT Micromammiferes.sex FROM Micromammiferes WHERE (((Micromammiferes.sex)=females));) The sql works well in access but in R, I keep getting: Error: syntax error. R is likely to have problems with nested quote characters. Ie: x = SELECT Micromammiferes.sex FROM Micromammiferes WHERE (((Micromammiferes.sex)=females)); also results in a syntax error (my mailer split the line). __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] sqlQuery and string selection
(sorry if a duplicate pops through ...) Jérôme Lemaître wrote: Dear alls, Could someone tell me how to select a subset of string observations (e.g. females in a sex column) with sqlQuery in the RODBC library? Indeed, I'm trying to select a subset of observations on my access database with: female-sqlQuery(mychannel,SELECT Micromammiferes.sex FROM Micromammiferes WHERE (((Micromammiferes.sex)=females));) The sql works well in access but in R, I keep getting: Error: syntax error. Most computer software has problems with nested quote characters. Ie: x = SELECT Micromammiferes.sex FROM Micromammiferes WHERE (((Micromammiferes.sex)=females)); also results in a syntax error (my mailer split the line). __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] graphics - current filename
I would like to query R for the current (or last used) filename for a graphics device. Eg after png(filename=plot%02d.png) I would like something like the output of dev.cur() but with the %02d expanded to the current name. Can anyone point me at where I can find this please? __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] aggregation with extra columns
R People, Thanks for your help on my recent questions, Excel is never going to disappear from my office but with graphics from lattice package and some other stuff in R I have been able to add some value. I have a problem I haven't been able to figure out with aggregation, I mentioned it earlier but didn't state it very clearly. Basically I have many defect events and I want to grab the most recent event for each defect number: eg: date defectnum state 2004-12-1 10 create 2004-12-2 11 create 2004-12-4 10 close 2004-12-7 11 fix to: date defectnum state 2004-12-4 10 close 2004-12-7 11 fix Now with aggregate I can get the rows I want but not with the state attached: aggregate(list(date=ev$date), by=list(defectnum=ev$defectnum), max) Gives me the rows I want but I have lost the state. I have tried doing a merge afterwards but now I realise why they warned me avoid using dates as database keys. What would be handy is somehow getting back the index vector from the aggregate function. I realize in the general case this wouldn't work for aggregate but in the case of min/max the result is a specific record. Someone earlier mentioned some tricks with sort but I haven't been able to make that get to where I want. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] RE: aggregating dates
The solution I came up with myself was simply to coerce the integer back to
POSIXct:
class(ev$date) = POSIXct
Can't say it is the right way to do it but it seem to work.
A second related problem I haven't been able to solve as yet is how to include
incidents columns (those not in 'x' or 'by') in an aggregate.
names(ev): date defectnum state
aggregate(ev$date, by=list(ev$defectnum), max)
This returns only the date and defectnum, I also need the state.
I tried writing my own aggregator function:
maxevent = function(events) {
events[which.max(events$date),]
}
aggregate(ev, by=list(ev$defectnum), maxevent)
But I get:
Error in [.default(events, which.max(events$date), ) :
incorrect number of dimensions
I am trying to retrieve only the rows of ev with the latest date for a given
defectnum.
cheers
Message: 29
Date: Mon, 31 Jan 2005 16:16:35 +1100
From: Paul Sorenson [EMAIL PROTECTED]
Subject: [R] aggregating dates
To: r-help@stat.math.ethz.ch
Message-ID: [EMAIL PROTECTED]
Content-Type: text/plain; charset=iso-8859-1
I have a frame which contains 3 columns:
date defectnum state
And I want to get the most recent state change for a given
defect number. date is POSIXct.
I have tried:
aggregate(ev$date, by=list(ev$defectnum), max)
Which appears to be working except that the dates seem to
come back as integers (presumably the internal representation
of POSIXct).
When I execute max(ev$date) the result remains POSIXct.
I have been dredging through the help among DateTimeClasses
and haven't found a function that converts these integers to
some kind of date class. Or a method for using aggregate
which doesn't perform the conversion in the first place.
Any clues?
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] aggregating dates
I have a frame which contains 3 columns: date defectnum state And I want to get the most recent state change for a given defect number. date is POSIXct. I have tried: aggregate(ev$date, by=list(ev$defectnum), max) Which appears to be working except that the dates seem to come back as integers (presumably the internal representation of POSIXct). When I execute max(ev$date) the result remains POSIXct. I have been dredging through the help among DateTimeClasses and haven't found a function that converts these integers to some kind of date class. Or a method for using aggregate which doesn't perform the conversion in the first place. Any clues? __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] lookups and joins
I have some data coming from SQL sources that I wish to relate in various ways.
For reasons only known to our IT people, this can't be done in SQL at present.
I am looking for an R'ish technique for looking up new columns on a data frame.
As a simple, hardwired example I have tried the following:
# This gives me two columns, one the lookup value and the second one
# the result column, ie my lookup table.
stcl = read.csv(stockclass.csv)
stockclass = as.vector(stcl$stock_class)
# This gives me what appears to be a dictionary or map
names(stockclass) = as.vector(stcl$stock_group)
getstockclass = function(stock_group) {
try(stockclass[[stock_group]], TRUE)
}
csg$stk_class=factor(sapply(csg$stock_group, getstockclass))
I need the try since if there is a missing value I get an exception.
I also tried something along the lines of (from memory):
getstockclass = function(stock_group) {
stcl[which(stcl$stock_group == stock_group),]$stock_class
}
These work but I just wanted to check if there was an inbuilt way to do this
kind of thing in R? I searched on join without much luck.
Really what I would like is a generic function that:
- Takes 2 data frames,
- Some kind of specification on which column(s) to join
- Outputs the joined frames, or perhaps a vector which is an index
vector that I can use on the second data frame.
I don't really want to reinvent SQL and my data sets are not huge.
cheers
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
RE: [R] easing out of Excel
Thanks for the responses to this question, I fully realise it is a rather open question and the open pointers are the kind of thing I am looking for. I will look into the lattice package and layout. Regarding the HTML output, the current tool chain assets that I have have been refactored over time and are almost totally driven by config files so they suit my purposes very well. I will look into other possibilities at a later date. For those looking for a more rigorous specification of the problem, you are well justified in this. I was deliberately fuzzy since managers just want stuff and I thought casting a wide net would pay off. The problem is to summarise information which is nothing more than sales data. The kinds of columns I am dealing with look like: date, customer, invoice_no, product, amount, sales_region, etc etc. Managers want to know things like: - which products are doing well - which regions are doing well - who are good customers - etc To me these are simple aggregates and sorts, with visual presentations to match. I figure a bit of effort, R can extract considerably more useful information from the data. To be honest I am just evolving it as I go, using an existing spreadsheet as a basis. I try something and if it is useful then great, if not, put it down to learning. cheers __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] easing out of Excel
I know enough about R to be dangerous and our marketing people have asked me to automate some reporting. Data comes from an SQL source and graphs and various summaries are currently created manually in Excel. The raw information is invoicing records and the reporting is basically summaries by customer, region, product line etc. With function such as aggregate(), hist() and pareto() (which someone on this list kindly pointed me at) I can produce something roughly equivalent to the current reports. My question is, are there any neat R lock out features people here like to use on this kind of info, particularly when the output is very visual (report is intended for marketing people). Another way of looking at this is, What kind of hidden information can I extract with R that the Excel solution hasn't touched? For example, even the pareto plot mentioned earlier is something the Excel guys haven't thought of or can't easily produce. regards BTW the tool chain I am using goes something like: Production (run daily): DB - SQL/python - CSV - R/python - images - network Presentation: network - CGI/python - browser __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] Can R be useful to me?
On Wed, Mar 31, 2004 at 08:32:49AM -0300, Luiz Rodrigo Tozzi wrote: My question is: can I generate graphics and tables in gif ou any graphical format through shell script?? can I call R, run a package in my ascii data e then export the results to a gif, png or whatever? On Wed, Mar 31, 2004 at 08:32:49AM -0300, Luiz Rodrigo Tozzi wrote: My question is: can I generate graphics and tables in gif ou any graphical format through shell script?? can I call R, run a package in my ascii data e then export the results to a gif, png or whatever? I do this on my windows machine to generate project metrics automatically every morning. For my situation, the following works well: o Gather CSV files from various sources (I use python). o Run R to generate PNG (or whatever) format images. I am aware of packages to link python and R but I just open an R process and stream commands to it. o Copy the CSV files and images to network directory. This network directory is also accessible to the intranet via apache. I wrote a simple CGI script in python to present all the diagrams back to the browser. __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] Re: FDA and ICH Compliance of R
Antonia Drugica [EMAIL PROTECTED] writes: Does anybody know if R is FDA or ICH (or EMEA...) compliant? AFAIK S-Plus is but that means nothing... As Thomas pointed out, that does mean nothing -- there was a group of folks discussing what might be done to help, earlier this year, but then everyone got busy... FDA has a guidance document for off-the-shelf software: http://www.fda.gov/cdrh/ode/guidance/585.html Note that if focuses on OTS used in medical devices. However you should read it. The document: http://www.fda.gov/cdrh/comp/guidance/938.html Has a section on applicability of the software guidance (which encompasses stuff outside the instrument itself. Since I am no lawyer, I can't say whether R falls within this scope. It is fair to say however that the FDA consider safety and effectiveness very important. If the effectiveness that you claim is based on statistics provided by software, or you rely in software for determining safe levels (eg of a drug) then I would say (as a layman) it is largely irrelevant whether the vendor claims some sort of FDA badge because that does not prevent someone from writing dodgy scripts. So what you can do (other than soliciting mail list opinions) includes: o Think. What are the implications for end users, patients etc. Would you take a pill based on your own stats? o Read what the FDA have to say. o Evaluate the risk and safety implications of the statistics you use. o Manage the risk. Eg can you indepently confirm the key results? o Your scripts are software - the FDA requires evidence of a credible process in the life cycle of software, whether they be spreadsheets, real time control systems or whatever. OTS software that is validated does not remove responsibility for reducing risk to acceptable levels. HTH paul __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
[R] RE: best editor for .R files
I use gvim. It has the syntax highlighting and works on most platforms. My guess is that if you want more integration then the emacs path is the way to go. Note that I am not an R expert. Date: Thu, 20 Nov 2003 22:27:05 +0100 From: Angel [EMAIL PROTECTED] Subject: [R] best editor for .R files To: [EMAIL PROTECTED] Message-ID: [EMAIL PROTECTED] Content-Type: text/plain; charset=iso-8859-1 Which is the best editor for .R files? I currently use kate on my linux as it has R highlighting and allows me to split the window into two: in one I edit the .R file and in the other I have a shell so I run R and can easily copy and paste the code. There are some features that I don't like and I am having a look on some alternatives. I've heard wonders of emacs with ess but I am a little bit frightened of the steep learning curve. What do the R experts use or would recommend using? Both linux and/or windows alternatives are welcomed. I guess it would much depend on the particular needs/preferences of each user but I would like to know which are the most commonly used editors. [[alternative HTML version deleted]] __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
[R] model tutorial
The help and man pages of R discuss the model syntax eg a ~ b. They kind of just appear as if everyone knows why - I must be a bit of a mug. Are there any tutorial style documents around on this topic? cheers __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
[R] RE: relationship between two discrete variables
Further to my queries re relating discrete variables I have had a couple of tips on things I could try. This has lead me to attempt a marginal homogeneity test (http://ourworld.compuserve.com/homepages/jsuebersax/margin.htm). o Does anyone have an opinion on whether this approach would be appropriate? o Does R have some built in help to do this? I found a reference to the McNemar test but not to the Stuart-Maxwell test. cheers [[alternative HTML version deleted]] __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
RE: [R] xlims of barplot
-Original Message- From: Marc Schwartz [mailto:[EMAIL PROTECTED] Sent: Friday, 14 November 2003 12:49 AM To: Paul Sorenson Cc: [EMAIL PROTECTED] Subject: Re: [R] xlims of barplot On Wed, 2003-11-12 at 23:54, Paul Sorenson wrote: I would like to create a family of barplots with the same xlimits. Is there a way to read the xlimits from the first graph so I can apply it to the subsequent ones? I have tried just taking the min and max of the x data and the plot doesn't show. cheers A point of clarification: When you say x axis limits, are you referring to the bar heights in a horizontal barplot or are you referring to the range of the x axis with vertical bars? A critical difference. ... If you are talking about a vertical barplot, then the x axis range will be the same for each barplot under the following conditions, without having to set it: 1. You have the same number of bars in each plot 2. You do not change the values of 'space', 'width' or 'beside' across the plots. Also, keep in mind that the bars are NOT centered over integer values on the respective axis. You can get the bar center positions by using: Sorry for being vague, it is the latter case, vertical bars. The data doesn't satisfy condition 1. The family of 6 plots is datestamped data, the first plot showing all defects, then each subsequent plot showing defects of each severity level we define. The min and max of each of the subsequent datasets is in general a subset of the full dataset. I can easily plot them but it would be nice to keep the same x limits on each graph. The x data is POSIXct although I suspect that is not relevant. [[alternative HTML version deleted]] __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
RE: [R] xlims of barplot
-Original Message- From: Marc Schwartz [mailto:[EMAIL PROTECTED] Sent: Friday, 14 November 2003 9:44 AM To: Paul Sorenson Cc: [EMAIL PROTECTED] Subject: RE: [R] xlims of barplot On Thu, 2003-11-13 at 15:53, Paul Sorenson wrote: SNIP Sorry for being vague, it is the latter case, vertical bars. The data doesn't satisfy condition 1. The family of 6 plots is datestamped data, the first plot showing all defects, then each subsequent plot showing defects of each severity level we define. The min and max of each of the subsequent datasets is in general a subset of the full dataset. I can easily plot them but it would be nice to keep the same x limits on each graph. The x data is POSIXct although I suspect that is not relevant. OK...I think I understand what you are doing. You want a series of barplots that have space for the same number of vertical bars along the x axis, but there may be gaps in the series for any given barplot. Presumably, those gaps may be anywhere in the time series along the x axis. Correct and most problematically at the ends. Hint: barplot() will leave gaps in the bar series where an NA appears in the vector or in a matrix column of height values. ... So, the key is to be sure that the vector or matrix has the same number of elements or matrix columns in each dataset. For your incomplete datasets, pad each series with NA's to fill out the missing entries in the time series. That sounds like a way forward. I just need to go back to the basics and learn how to add rows to data.frames. I am sure it won't be hard, its just my personal learning curve with several new data types (factors, tables, data.frames vs vectors, lists, arrays which I am more familiar with). For example, yesterday I tried max(myFactor) and it gave me an error (something like must be a vector), even though to my naive way of thinking myFactor clearly had a numeric max. Thanks [[alternative HTML version deleted]] __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
[R] more barplot presentation questions
Thanks to those who pointed me at the solutions to the legend overprinting the bars. I took the easy way of rescaling the y axis, picking the scaling factor for stacked bars is somewhat problematic but sufficient for my application. I have another couple of barplot questions: - Can I extend the major ticks on the Y axis across the page? Or both axes to form a grid? - A really neat graph for me would be a combination of side-by-side and stacked bars in a single plot to display an additional category. The background on the second problem is that I am displaying software defect metrics. For each month (the bins) the categories of interest are: - new/fixed/closed - numeric severity (1 - 5) I am currently displaying 5 separate graphs (6 when you take the aggregate into account) with new/fixed/closed side-by-side. If within the side-by-side graphs I could show the severity stacked that would be very neat. Cheers __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
[R] legend over-prints barplot bar
When I create a bar plot, the legend is obscuring the rightmost bar. I haven't found a setting that appears to affect the positioning of the legend - any tips re moving the legend would be most appreciated. paul sorenson __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
[R] RPy for windows and python 2.3
Does anyone have an RPy installer or some way of getting RPy to work with python 2.3 on windows? I am using R 1.7.1. I have tried compiling with several different compilers from the source and the best I got was parser errors in header files with mingw32. paul __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
