[R] Combining elements of vectors
Dear list, I have a vector of elements which I want to combined each with each, but none with itself. For example, v - c(a, b, c) and I need a function 'combine' such that combine(v) [[1]] [1] a b [[2]] [1] a b [[3]] [1] b c I am not very interested in the orders of the output items for now, and the form can be something differs from list, like matrix or data frame. I know of 'expand.grid', but it will combine each item with each item including itself, so not what I wants. Could you help me please. Thank you. Mvh., Marie [[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] Combining elements of vectors
Thank you both Dimitiris and Jorge Ivan! I have just found it myself that 'combn' does what I need: combn(v, 2, simplify=TRUE) is exactly what I need. Mvh., Marie On Mon, Jun 8, 2009 at 3:03 PM, Dimitris Rizopoulos d.rizopou...@erasmusmc.nl wrote: one way is: combn(c(a, b, c), 2) I hope it helps. Best, Dimitris Marie Sivertsen wrote: Dear list, I have a vector of elements which I want to combined each with each, but none with itself. For example, v - c(a, b, c) and I need a function 'combine' such that combine(v) [[1]] [1] a b [[2]] [1] a b [[3]] [1] b c I am not very interested in the orders of the output items for now, and the form can be something differs from list, like matrix or data frame. I know of 'expand.grid', but it will combine each item with each item including itself, so not what I wants. Could you help me please. Thank you. Mvh., Marie [[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. -- Dimitris Rizopoulos Assistant Professor Department of Biostatistics Erasmus University Medical Center Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands Tel: +31/(0)10/7043478 Fax: +31/(0)10/7043014 [[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] Combining elements of vectors
On Mon, Jun 8, 2009 at 3:04 PM, baptiste auguie baptiste.aug...@gmail.comwrote: Marie Sivertsen wrote: Dear list, I have a vector of elements which I want to combined each with each, but none with itself. For example, v - c(a, b, c) and I need a function 'combine' such that combine(v) [[1]] [1] a b [[2]] [1] a b [[3]] [1] b c I am not very interested in the orders of the output items for now, and the form can be something differs from list, like matrix or data frame. I know of 'expand.grid', but it will combine each item with each item including itself, so not what I wants. Could you help me please. Thank you. Mvh., Marie [[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. I guess you actually want, [[1]] [1] a b [[2]] [1] a c # not a b again Yes I made a mistake. Thank you. Mvh., Marie [[3]] [1] b c if so, try ?combn combn(v,2) [,1] [,2] [,3] [1,] a a b [2,] b c c HTH, baptiste -- _ Baptiste Auguié School of Physics University of Exeter Stocker Road, Exeter, Devon, EX4 4QL, UK Phone: +44 1392 264187 http://newton.ex.ac.uk/research/emag __ [[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] Parsing configuration files
Dear list,
Is there any functionality in R that would allow me to parse config files?
I have trie ??config and apropos('config') without succes, and also search
the R package site.
Mvh.
Marie
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Re: [R] How to find the path or the current file?
Wacek, this work for me. Takk!
Mvh.
Marie
On Wed, Mar 25, 2009 at 2:59 PM, Wacek Kusnierczyk
waclaw.marcin.kusnierc...@idi.ntnu.no wrote:
Wacek Kusnierczyk wrote:
hacking up on gabor's solution, i've created a trivial function that
will allow you to access a file given a path relative to the path of the
file calling the function.
to be concrete, suppose you have two files -- one library and one
executable -- located in two sibling directories, and you want one of
them to access (e.g., source) the other without the need to specify the
absolute path, and irrespectively of the current working directory.
here is a simple example.
mkdir foo/{bin,lib} -p
echo '
# the library file
foo = function() cat(foo\n)
' foo/lib/lib.r
echo '
# the executable file
source(http://miscell.googlecode.com/svn/rpath/rpath.r;)
source(rpath(../lib/lib.r))
foo()
' foo/bin/bin.r
one thing i forgot to add: that contrarily to what gabor warned about
his solution, you don't have to have the call to rpath at the top level,
and can embed it in nested nevironments or calls; thus, the following
executable:
echo '
# the executable file
source(http://miscell.googlecode.com/svn/rpath/rpath.r;)
(function()
(function()
(function() {
source(rpath(../lib/lib.r))
foo() })())())()
' foo/bin/bin.r
will still work as below.
now you can execute foo/bin/bin.r from whatever location, or source it
in r within whatever working directory, and still have it load
foo/lib/lib.r:
r foo/bin/bin.r
# foo
(cd foo; r bin/bin.r)
# foo
r -e 'source(foo/bin/bin.r)'
# foo
(cd foo/bin; r -e 'source(bin.r)')
# foo
so the trick for you is to source rpath, and voila. (note, it's not
foolproof; as duncan explained, such approach may not work in some
circumstances.)
does this address your problem?
hilsen,
vQ
Gabor Grothendieck wrote:
See:
https://stat.ethz.ch/pipermail/r-help/2009-January/184745.html
On Tue, Mar 24, 2009 at 7:16 AM, Marie Sivertsen mariesiv...@gmail.com
wrote:
Dear useRs,
I have a collection of source file and some of these call others. The
files
are distribute among a number of directories, and to know how to call
some
other file they need to know what file is currently executed.
As example, I have a file 'search.R' located in directory 'bin' which
needs
to access the file 'terms.conf' located in the directory 'conf', a
sibling
of 'bin'. I can have somethings like readLines('../conf/terms.conf')
in
search.R, but this work only if search.R is executed from bin, when
getwd is
'bin'. But when search.R calls from the parent as bin/search.R or any
other
derectory then R complains that it could not find the file
'../conf/terms.conf'.
So my questions is: how can the file search.R, when executied,
discover its
own location and load terms.conf from location of
search.R/../conf/terms.conf? the location of search.R can be
unrelated to
the current directory.
Mvh.
Marie
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[R] How to find the path or the current file?
Dear useRs,
I have a collection of source file and some of these call others. The files
are distribute among a number of directories, and to know how to call some
other file they need to know what file is currently executed.
As example, I have a file 'search.R' located in directory 'bin' which needs
to access the file 'terms.conf' located in the directory 'conf', a sibling
of 'bin'. I can have somethings like readLines('../conf/terms.conf') in
search.R, but this work only if search.R is executed from bin, when getwd is
'bin'. But when search.R calls from the parent as bin/search.R or any other
derectory then R complains that it could not find the file
'../conf/terms.conf'.
So my questions is: how can the file search.R, when executied, discover its
own location and load terms.conf from location of
search.R/../conf/terms.conf? the location of search.R can be unrelated to
the current directory.
Mvh.
Marie
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Re: [R] How to find the path or the current file?
Thank you Gabor and Duncan for your replys.
Mvh.
Marie
On Tue, Mar 24, 2009 at 1:00 PM, Gabor Grothendieck ggrothendi...@gmail.com
wrote:
See:
https://stat.ethz.ch/pipermail/r-help/2009-January/184745.html
On Tue, Mar 24, 2009 at 7:16 AM, Marie Sivertsen mariesiv...@gmail.com
wrote:
Dear useRs,
I have a collection of source file and some of these call others. The
files
are distribute among a number of directories, and to know how to call
some
other file they need to know what file is currently executed.
As example, I have a file 'search.R' located in directory 'bin' which
needs
to access the file 'terms.conf' located in the directory 'conf', a
sibling
of 'bin'. I can have somethings like readLines('../conf/terms.conf') in
search.R, but this work only if search.R is executed from bin, when getwd
is
'bin'. But when search.R calls from the parent as bin/search.R or any
other
derectory then R complains that it could not find the file
'../conf/terms.conf'.
So my questions is: how can the file search.R, when executied, discover
its
own location and load terms.conf from location of
search.R/../conf/terms.conf? the location of search.R can be unrelated
to
the current directory.
Mvh.
Marie
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http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
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[R] Problems with ARIMA models?
Dear R, I have find a website where they report problem with ARIMA models in R. I run the examples there and they give result as shown on the website. Does this mean that nothing has corrected in R? Maybe you not have seen the page, but the author said he contacted you. Here is the URL: http://www.stat.pitt.edu/stoffer/tsa2/Rissues.htm I like to know your opinion. Mvh. Marie [[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] Problem with plotting data from within a function
Dear List,
I try to develop code where plotting functions are embeded in my own
functions. The following is simplified example:
test - function() {
data - data.frame(x=rep(1:2, each=50), y=rnorm(100))
library(lattice)
attach(data)
xyplot(y~x)
detach()
}
test()
As far as I understand R, when test is called this should create one local
data frame, attach it that it's columns are available directly, load the
lattice library, plot data, and then detach the data frame. But, when I
call test, nothing happens. I see not plot and no error message. When I
try the script from Rscript, nothing happens too. But when I copy the
inside code from test and run it directly, all seems to work. What am I
doing wrong? Is this a question to be asked here, or to the developers of
lattice package?
Mvh.
Marie
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Re: [R] eval and as.name
Hi, Why do you use the equals sign for assignment instead of the arrow, is this equal? Mvh. Marie On Thu, Feb 5, 2009 at 11:59 PM, Wacek Kusnierczyk waclaw.marcin.kusnierc...@idi.ntnu.no wrote: you may want to avoid this sort of indirection by using lists with named components: d = list(a=c(1,3,5,7), b=c(2,4,6,8)) sum(unlist(d)) with(d, sum(a+b)) sum(d[['a']], d[['b']]) sum(sapply(n, function(v) d[[v]])) and so on. vQ __ 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] tab characters
I see 'The R Inferno' being refered quiet often recently. But it was now pointed by Duncan Murdoch that for example the statement concerning variables in a for loop is not correct in there (page 62). As I can not find any information about the book been reviewed by anyone I have a question: is it reliable resource for learning about R? What is the authority of Patrick Burns? I would like to avoid spending much time on learning from 'The R Inferno' to only later discover that it was wrong. Mvh. Marie On Fri, Jan 30, 2009 at 11:13 AM, Patrick Burns pbu...@pburns.seanet.comwrote: 'The R Inferno' pages 45-46. Patrick Burns patr...@burns-stat.com +44 (0)20 8525 0696 http://www.burns-stat.com (home of The R Inferno and A Guide for the Unwilling S User) Nick Matzke wrote: Hi all, Working at the R command line, how do I get strings to display e.g. tab or newline characters as they should be displayed, rather than as e.g. \n or \t? e.g.: x=\t x=\t x [1] \t print(x) [1] \t __ 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] tab characters
Thank you both Peter and Duncan for explanations. 'The R Inferno' is indeed not so much introduction but I find it useful to know about how I can go wrong in simple things before I do. Mvh. Marie On Fri, Jan 30, 2009 at 3:03 PM, Peter Dalgaard p.dalga...@biostat.ku.dkwrote: Marie Sivertsen wrote: I see 'The R Inferno' being refered quiet often recently. But it was now pointed by Duncan Murdoch that for example the statement concerning variables in a for loop is not correct in there (page 62). As I can not find any information about the book been reviewed by anyone I have a question: is it reliable resource for learning about R? What is the authority of Patrick Burns? I would like to avoid spending much time on learning from 'The R Inferno' to only later discover that it was wrong. In short: Don't worry too much. Pat is an experienced S and R user. In fact, he's been around since R was little but a gleam in its fathers' eyes. He has a record of writing stuff and publishing on the web, in a style somewhat different from what the publishing companies seem to want. The R Inferno is his latest addition, so he's liable to make a few Hey, I wrote about that kind of posts. A quick look suggest that this should be quite an amusing read, but it isn't a textbook for beginners learning R. Rather, it is assumed that you already know the basics, and now need to read about the pitfalls. There could be inaccuracies (the for loop description is indeed mildly off-base), but the intended audience can reasonably be assumed to possess a critical mind. And the nice thing about web publications is that mistakes can be fixed quickly. -pd [[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] Unexpected behaviour of the as.Date (was: Error as.Date on Invalid Dates)
Thank you Greg for your explanations. I think you explained the problem clearly now. Mvh. Marie On Thu, Jan 22, 2009 at 10:24 PM, Greg Snow greg.s...@imail.org wrote: Comments interspersed below From: Marie Sivertsen [mailto:mariesiv...@gmail.com] Sent: Thursday, January 22, 2009 1:17 PM To: Greg Snow Cc: r-h...@stat.math.ethz.ch Subject: Re: [R] Unexpected behaviour of the as.Date (was: Error as.Date on Invalid Dates) [snip] For your question, the help page for as.Date includes: format: A character string. The default is '%Y-%m-%d'. For details see 'strftime'. To be strict, neither 1/13/2001 nor 13/1/2001 match the format, so both should raise error, I think. Since the behaviour seem not to apply the default strictly, why ought one think 13/1/2001 will not be parsed the only reasonable way? The help page for as.Date refers to the help page for strptime which says that details are system specific. So there may be some systems where you would get an error from '/' not being '-', but apparently on your system they are treated the same. Personally I see a big difference between interpreting an obvious separator as such and changing the order of values. The fact that it sometimes gets the one correct does not imply to me that the other should happen automatically. Dealing with the separators can be done on an individual basis as each character string is processed. Guessing the order of the entries could require looking at the entire vector/file/dataset, which I expect would slow things down quite a bit. (and how long would it be before someone complained that it processed file A correctly, but file B should have been treated like A, but since it only included days less than 13, the program did not realize this). And Character strings are processed as far as necessary for the format specified: any trailing characters are ignored. I don't see anything in your examples that runs counter to the above. Yes they do. None of them match the format, but some parse correctly, some produce rubbish, and some raise error. Maybe you want to improve the help page fo the as.Date to say something like The default is a sequence of numerical representations of the year, then the month, then the day, separated by one of '-', '/', ..., which make it clearer. But is it correct? It may be system dependent (or all systems may do the exact same now). How about if the help page tells you to find out for your system (easy fix, it already does). Remember that computers do exactly what you tell them to do, not what you think that they should do. Computers do exactly what they were programmed to do, and what they will do depends on what the developer told them to do when they are given certain input. I expect them to do exactly what I tell them to do, and it is to parse 1/13/2001 the only reasonable way. It seems that someone told them to do something else... I was using the general 'you' above that includes the programmer as well as the user, since you (singular) did not specify the format, the computer used the default format that the programmer (part of the collective 'you') specified which says the order is year, month, day. Many problems come as a result of users forgetting that they are smarter than the computer. I see 3 ways to remedy the problem: 1. Make computers that are as smart or smarter than people. 2. Make the programmers anticipate every way that someone may use a particular function and make them implement all of the functionality even if they don't think it is worth the time/effort since there is an easy work around for many of the less likely used features. 3. Don't expect the computer to guess correctly and tell it exactly what you want it to do. I don't think that number 1 will ever happen, and there are plenty of science fiction stories that suggest problems with even trying. Option 2 stinks of hubris, and even if it were possible, I personally would not want to wait until they were finished before being able to use the functions/programs. Which leaves option 3, which I think is the best approach even without arguments against the others. I think the moral of this story is: program defensively, always specify a date format! Mvh. Marie -- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare greg.s...@imail.org 801.408.8111 [[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] Error as.Date on Invalid Dates
I am relatively new to R, so maybe I am miss something, but I now tried the as.Date now and have problems understanding how it works (or don't work as it seem). Brian D Ripley wrote: On Thu, 22 Jan 2009, Terry Therneau wrote: One idea is to use the as.date function, for the older (and less capable) 'date' class. This is currently loaded by default with library(survival). It returns NA for an invalid date rather than dying. So does as.Date **if you specify the format** (as you have to with your as.date: it has a default one): as.Date(2001/1/1) Works fine as.Date(1/1/2001) Prints 1-01-20 ??? as.Date(13/1/2001) Prints 13-01-20 ??? as.Date(1/13/2001) Prints error: not in standard unambigous format It seems that as if both 1/1/2001 and 13/1/2001 were considered by R to be in a standard unambiguous format (or otherwise an error be reported?) and yet they are parsed incorrectly according to what one could think is obvious. It is also surprizing that not only 13/1/2001 but also 1/2/2001 and 2/1/2001 are successful but incorrect parsed as if they are unambiguous, and yet 13/1/2001 is ambiguous, though there is really just one way to parse it meaningfully. I think the strings that are incorrectly parsed should raise errors, and the last example should be succesful parsed. What is the reason for the observed? Mvh. Marie [[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] Unexpected behaviour of the as.Date (was: Error as.Date on Invalid Dates)
Dear Brian, I dont understand what you mean. The thread was about the as.Date which you suggested to be used instead of the as.date. Following your advice I tried the as.Date and have questions about the observed behaviour, which was surprising to me. Is this what you call hijacking? Do you mean I ought start a new thread instead? I thought my question were relevant to the threads' subject. I am sorry if it were not. So here is the questions once again: why do the as.Date behave as in my examples below, is this intended? On Thu, Jan 22, 2009 at 3:55 PM, Brian D Ripley rip...@stats.ox.ac.ukwrote: You've hijacked a thread here. On Thu, 22 Jan 2009, Marie Sivertsen wrote: I am relatively new to R, so maybe I am miss something, but I now tried the a s.Date now and have problems understanding how it works (or don't work as it seem). Brian D Ripley wrote: On Thu, 22 Jan 2009, Terry Therneau wrote: One idea is to use the as.date function, for the older (and less capable) 'date' class. This is currently loaded by default with library(survival). It re turns NA for an invalid date rather than dying. So does as.Date *if you specify the format* (as you have to with your as.da te: it has a default one): My examples: as.Date(2001/1/1) Works fine as.Date(1/1/2001) Prints 1-01-20 ??? as.Date(13/1/2001) Prints 13-01-20 ??? as.Date(1/13/2001) Prints error: not in standard unambigous format It seems that as if both 1/1/2001 and 13/1/2001 were considered by R to b e in a standard unambiguous format (or otherwise an error be reported?) and yet they are parsed incorrectly according to what one could think is obvious. It is a lso surprizing that not only 13/1/2001 but also 1/2/2001 and 2/1/2001 are successful but incorrect parsed as if they are unambiguous, and yet 13/1/2001 is ambiguous, though there is really just one way to parse it meaningfully. I think the strings that are incorrectly parsed should raise errors, and the last example should be succesful parsed. What is the reason for the observed ? Mvh. Marie -- Brian D. Ripley, rip...@stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/http://www.stats.ox.ac.uk/%7Eripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UKFax: +44 1865 272595 [[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] Unexpected behaviour of the as.Date (was: Error as.Date on Invalid Dates)
Thank you Greg and Gabor for explanations. I have some further question below. On Thu, Jan 22, 2009 at 8:16 PM, Greg Snow greg.s...@imail.org wrote: I believe the original thread was about whether the function returns NA or stops with an error when given an invalid date (such as Feb 29 in a non-leap year). Your question was about how as.Date returned something different from what you expected. Related, but different enough that it probably would have been better to start a new thread. I hope it was then okay I started a new thread. For your question, the help page for as.Date includes: format: A character string. The default is '%Y-%m-%d'. For details see 'strftime'. To be strict, neither 1/13/2001 nor 13/1/2001 match the format, so both should raise error, I think. Since the behaviour seem not to apply the default strictly, why ought one think 13/1/2001 will not be parsed the only reasonable way? And Character strings are processed as far as necessary for the format specified: any trailing characters are ignored. I don't see anything in your examples that runs counter to the above. Yes they do. None of them match the format, but some parse correctly, some produce rubbish, and some raise error. Maybe you want to improve the help page fo the as.Date to say something like The default is a sequence of numerical representations of the year, then the month, then the day, separated by one of '-', '/', ..., which make it clearer. Remember that computers do exactly what you tell them to do, not what you think that they should do. Computers do exactly what they were programmed to do, and what they will do depends on what the developer told them to do when they are given certain input. I expect them to do exactly what I tell them to do, and it is to parse 1/13/2001 the only reasonable way. It seems that someone told them to do something else... Mvh. Marie [[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.
