[R] How to repeat vectors ?
Hi, If I have a matrix , say a11 a12 a21 a22 Is there a routine to get: a11 a12 a11 a12 a21 a22 a21 a22 Thanks a lot for any help. best __ 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.
Re: [R] How to repeat vectors ?
I just figured out a way to do this: rep.vec - function(X,n)return(t(array(rep(X,n),c(length(X),n Then,apply(MyMatrix, 2, rep.vec,2) Is there a better way ? Is there an internal function to repeat a vector or matrix ? Thanks a lot. - Original Message - From: Tong Wang [EMAIL PROTECTED] Date: Friday, September 29, 2006 11:23 pm Subject: How to repeat vectors ? To: r-help@stat.math.ethz.ch Hi, If I have a matrix , say a11 a12 a21 a22 Is there a routine to get: a11 a12 a11 a12 a21 a22 a21 a22 Thanks a lot for any help. best __ 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.
Re: [R] strange warning message
On 9/30/2006 1:00 AM, Tong Wang wrote: Hi Duncan: Thank you for your help last time, since I do not use NULL to indicate empty enviroment, I think I'm fine. And yes, I did upgrade my R version recently, but how comes I still get this warning for new files created and saved after that update ? Is there anyway to get rid of this message ? Please show some code that leads to the message. You shouldn't get it in new objects, but there could be a bug in R or in a package you're using. Duncan Murdoch Thanks a lot . best - Original Message - From: Duncan Murdoch [EMAIL PROTECTED] Date: Saturday, September 23, 2006 5:59 pm Subject: Re: [R] strange warning message To: Tong Wang [EMAIL PROTECTED] Cc: r-help@stat.math.ethz.ch On 9/23/2006 7:15 PM, Tong Wang wrote: Hi Everyone, I recently start to get this warning message, while loading files in to R. Could someone tell me what does it mean ? I am using R 2.3.0 with Emacs on WinXP. use of NULL environment is deprecated The files were saved in an earlier version of R, which used NULL to indicate the base environment. R is telling you that NULL is not a legal environment. It should be automatically converted to baseenv(). In a number of cases, people used NULL to indicate an empty environment (even though there was no such thing when NULL was used); if that's true for your code, then you'll need to fix it. emptyenv() now gives you an empty environment if that's what you really want. 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 and provide commented, minimal, self-contained, reproducible code.
Re: [R] if then else
[EMAIL PROTECTED] wrote:
What is the correct form to write statement meaning:
if (a==1) {b=2; c=3}; else {b=0; c=0};
if (a==1) {b=2; c=3} else {b=0; c=0};
;-)
Uwe Ligges
Thank you
Jue Wang, Biostatistician
Contracted Position for Preclinical Research Biostatistics
PrO Unlimited
(908) 231-3022
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Re: [R] How to repeat vectors ?
Solution: m[rep(1:nrow(m),each=2),] Explanation: There is a simple and effective way to do this, using array slices. for your input matrix, m: m=matrix(paste(a,c(11,12,21,22),sep=),2) m [,1] [,2] [1,] a11 a21 [2,] a12 a22 you want to create [,1] [,2] [1,] a11 a21 [2,] a11 a21 [3,] a12 a22 [3,] a12 a22 First, let's just consider the simpler problem of vectors - taking the first column as an example: v=m[,1] v [1] a11 a12 and you want: [1] a11 a11 a12 a12 which is the first element, followed by another copy of the first, and then the second, followed by another copy of the second, ie: v[c(1,1,2,2)] [1] a11 a11 a12 a12 can we generate the sequence c(1,1,2,2) automatically? yes: rep(c(1,2),each=2) [1] 1 1 2 2 or: rep(1:length(v),each=2) [1] 1 1 2 2 So let's apply that to the vector: v[rep(1:length(v),each=2)] [1] a11 a11 a12 a12 Going back to the matrix, we can see that we want to do the same thing, but to the rows of the matrix, instead of the elements of the vector: Instead of length, we use nrow, and we use the row specifier [r,] m[rep(1:nrow(m),each=2),] [,1] [,2] [1,] a11 a21 [2,] a11 a21 [3,] a12 a22 [4,] a12 a22 -Alex On 30 Sep 2006, at 07:33, Tong Wang wrote: I just figured out a way to do this: rep.vec - function(X,n)return(t(array(rep(X,n),c (length(X),n Then,apply(MyMatrix, 2, rep.vec,2) Is there a better way ? Is there an internal function to repeat a vector or matrix ? Thanks a lot. - Original Message - From: Tong Wang [EMAIL PROTECTED] Date: Friday, September 29, 2006 11:23 pm Subject: How to repeat vectors ? To: r-help@stat.math.ethz.ch Hi, If I have a matrix , say a11 a12 a21 a22 Is there a routine to get: a11 a12 a11 a12 a21 a22 a21 a22 Thanks a lot for any help. best __ 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-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.
Re: [R] if then else
[EMAIL PROTECTED] wrote:
What is the correct form to write statement meaning:
if (a==1) {b=2; c=3}; else {b=0; c=0};
if (a==1) {b=2; c=3} else {b=0; c=0};
Jim
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and provide commented, minimal, self-contained, reproducible code.
Re: [R] How to repeat vectors ?
Maybe this one? MyMatrix - matrix(1:4, nrow=2) MyMatrix [,1] [,2] [1,]13 [2,]24 MyMatrix[rep(seq(nrow(MyMatrix)), each=2), ] [,1] [,2] [1,]13 [2,]13 [3,]24 [4,]24 HTH, Adrian On Saturday 30 September 2006 09:33, Tong Wang wrote: I just figured out a way to do this: rep.vec - function(X,n) return(t(array(rep(X,n),c(length(X),n Then,apply(MyMatrix, 2, rep.vec,2) Is there a better way ? Is there an internal function to repeat a vector or matrix ? Thanks a lot. - Original Message - From: Tong Wang [EMAIL PROTECTED] Date: Friday, September 29, 2006 11:23 pm Subject: How to repeat vectors ? To: r-help@stat.math.ethz.ch Hi, If I have a matrix , say a11 a12 a21 a22 Is there a routine to get: a11 a12 a11 a12 a21 a22 a21 a22 Thanks a lot for any help. best -- Adrian DUSA Arhiva Romana de Date Sociale Bd. Schitu Magureanu nr.1 050025 Bucuresti sectorul 5 Romania Tel./Fax: +40 21 3126618 \ +40 21 3120210 / int.101 __ 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.
Re: [R] How to repeat vectors ?
Here are 4 approaches in order from most compact to least. #1 only works for numeric matrices, # 2 is a shorter versio of your solution using rep.vec and # 3 is from Alex's post and is likely what I would use in practice. m - matrix(1:4, 2) # test matrix # 1 - m must be numeric for this one to work kronecker(m, rep(1,2)) # 2 apply(m, 2, rep, each = 2) # 2 # 3 - from Alex's post m[rep(1:nrow(m), each = 2),] # 4 matrix(rbind(c(m), c(m)), nc = ncol(m)) On 9/30/06, Tong Wang [EMAIL PROTECTED] wrote: I just figured out a way to do this: rep.vec - function(X,n)return(t(array(rep(X,n),c(length(X),n Then,apply(MyMatrix, 2, rep.vec,2) Is there a better way ? Is there an internal function to repeat a vector or matrix ? Thanks a lot. - Original Message - From: Tong Wang [EMAIL PROTECTED] Date: Friday, September 29, 2006 11:23 pm Subject: How to repeat vectors ? To: r-help@stat.math.ethz.ch Hi, If I have a matrix , say a11 a12 a21 a22 Is there a routine to get: a11 a12 a11 a12 a21 a22 a21 a22 Thanks a lot for any help. best __ 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-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] autologistic model? - what package?
Dear all, Could you pleas advise me on the following? I need to use general(ized) linear models (binomial distribution + logit link function) , to describe the preferred environment of each species (each sample is an individual in which I have measured several variables and also recorded the species it belongs to) However, must account for the spatial autrefoocorrelation between individuals. - So I think I need something like the so called autologistic models. isn't it? - What package would you advise me to use for that? Thank you in advance. Best regards, Sara Mouro [[alternative HTML version deleted]] __ 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.
Re: [R] Heteroskedasticity test
On Fri, 29 Sep 2006, Alberto Monteiro wrote: Is there any heteroskedasticity test in the package? Something that would flag a sample like x - c(rnorm(1000), rnorm(1000, 0, 1.2)) The package lmtest contains several tests for heteroskedasticity, in particular the Breusch-Pagan test (and also the Goldfeld-Quandt test for known change point). Furthermore, some of the structural change tests in strucchange can be used to test for non-constant variances, e.g, the Nyblom-Hansen test. Z Alberto Monteiro __ 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-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] Textmate project drawer: is there a Windows alternative?
I was reading about the project drawer feature in Textmate, which is Mac only. Is there a similar feature in a Windows based text editor that works with R. This feature sounds really useful. Thanks, Graham [[alternative HTML version deleted]] __ 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.
Re: [R] autologistic model? - what package?
On Sat, 30 Sep 2006, Sara Mouro wrote: Dear all, Could you pleas advise me on the following? I need to use general(ized) linear models (binomial distribution + logit link function) , to describe the preferred environment of each species (each sample is an individual in which I have measured several variables and also recorded the species it belongs to) However, must account for the spatial autrefoocorrelation between individuals. - So I think I need something like the so called autologistic models. isn't it? - What package would you advise me to use for that? RSiteSearch(autologistic) tells you what is known about this, which I'm afraid seems to be that no such function is available. Your question is very similar to the first hit in the site search, and that received no answer. If you are willing to try a different framework, the ME() Moran eigenvector function in the spdep package is a possibility, albeit not yet well-proven. It adds selected eigenvectors from a centred spatial weights matrix to the RHS of the glm to whiten out spatial dependence, but it will also whiten out or paint over other spatially patterned mis-specification problems. Thank you in advance. Best regards, Sara Mouro [[alternative HTML version deleted]] __ 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. -- Roger Bivand Economic Geography Section, Department of Economics, Norwegian School of Economics and Business Administration, Helleveien 30, N-5045 Bergen, Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43 e-mail: [EMAIL PROTECTED] __ 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] only need the p-value
Dear R users, I am calculating several cox proportional hazard models after each other (I know this is unusual, but I am just exploring the data). For the purpose of multiple testing correction I need to construct an array of these p-values. However since the output is not an array in itself, I cannot find a way to obtain the p-value only. attach(tms) goal-rep(0.7*FREQUENC[1:13],6) event- Surv(TIJD,FREQUENCgoal) results-coxph(event~ TYPETREA) summary(results) Call: coxph(formula = event ~ TYPETREA) n=76 (2 observations deleted due to missing) coef exp(coef) se(coef) z p TYPETREAnon-guided -0.826 0.4380.484 -1.71 0.088 exp(coef) exp(-coef) lower .95 upper .95 TYPETREAnon-guided 0.438 2.28 0.169 1.13 Rsquare= 0.041 (max possible= 0.829 ) Likelihood ratio test= 3.2 on 1 df, p=0.0737 Wald test= 2.91 on 1 df, p=0.088 Score (logrank) test = 3.08 on 1 df, p=0.0794 Does anyone now how to extract the p-value? Many thanks!, Marco __ 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.
Re: [R] Build error on Windows
On 9/29/2006 5:41 PM, Pankaj Savdekar wrote: Thanks for the quick reply. On 9/29/2006 8:53 AM, Pankaj Savdekar wrote: Hi, I'm trying to build R-2.3.1 on windows, but make gives me following error while building pkg-base: -- Making package base adding build stamp to DESCRIPTION make[4]: *** [frontmatter] Error 1 make[3]: *** [all] Error 2 make[2]: *** [pkg-base] Error 2 make[1]: *** [rpackage] Error 2 make: *** [all] Error 2 Please note that R.exe, Rterm.exe, Rgui.exe, RCmd.exe are build without any errors. I have three questions, can anyone please help me to resolve it? 1. How to solve (or get more details) of the above mentioned error? You need to look through the make files, to see what was happening. Reading the messages in reverse order: make all called make rpackage and so on to make frontmatter. The errors don't tell you which makefiles these are in, but the frontmatter target only occurs in src/gnuwin32/MakePkg. You could try deleting the @ signs from the lines for that target to see exactly what was happening when the error was generated. Yes I could figure out the source of 'frontmatter', but my problem is, there is no error message. I tried 'make -d' too. I tried removing '@', but no change. I'd guess that this is happening because your build is messed up: the base package is used in later build steps. If you start from a clean checkout and just call make, you probably won't see this. Is there any way to check what could have been wrong in building base package? You could look at whatever command in the makefile failed, and try it outside of the makefile, try variations on it, etc. I can't give more specific advice without more specific information on where the error happened. If you're not used to working in Windows, remember that it is not like Unix in several ways. In particular, you can't delete an open file, because it's considered an error for a file to exist unless it has a valid directory entry. If you try to replace a file that is open, the replacement will fail, and that may lead to other errors later. 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 and provide commented, minimal, self-contained, reproducible code.
Re: [R] if then else
On 9/30/2006 6:29 AM, Uwe Ligges wrote:
[EMAIL PROTECTED] wrote:
What is the correct form to write statement meaning:
if (a==1) {b=2; c=3}; else {b=0; c=0};
if (a==1) {b=2; c=3} else {b=0; c=0};
That's valid, but is it correct form? The semicolon at the end is not
needed. I'd say it's a bad idea to use one, because it might give a
mistaken impression about the meaning of something like
a = 1
+ 2;
It's better to avoid semi-colons whenever possible, to make sure the C
parser in your brain throws an exception and lets the R parser take over.
Duncan Murdoch
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Re: [R] Textmate project drawer: is there a Windows alternative?
On 9/30/2006 8:38 AM, Graham Smith wrote: I was reading about the project drawer feature in Textmate, which is Mac only. Is there a similar feature in a Windows based text editor that works with R. This feature sounds really useful. If you don't get an answer, it would probably be a good idea to describe what a project drawer is. The population of people who know Textmate and Windows text editors is probably pretty small. Duncan Murdoch Thanks, Graham [[alternative HTML version deleted]] __ 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-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.
Re: [R] Textmate project drawer: is there a Windows alternative?
Duncan, That seems a good idea :-) Project drawer appears to be a side panel in TextMate with folders where you can drop and drag R output and code into, not sure about graphic output, but that would also be useful. Each folder representing a particular project - hence the name. Graham On 30/09/06, Duncan Murdoch [EMAIL PROTECTED] wrote: On 9/30/2006 8:38 AM, Graham Smith wrote: I was reading about the project drawer feature in Textmate, which is Mac only. Is there a similar feature in a Windows based text editor that works with R. This feature sounds really useful. If you don't get an answer, it would probably be a good idea to describe what a project drawer is. The population of people who know Textmate and Windows text editors is probably pretty small. Duncan Murdoch Thanks, Graham [[alternative HTML version deleted]] __ 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. [[alternative HTML version deleted]] __ 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.
Re: [R] if then else
Duncan Murdoch wrote:
On 9/30/2006 6:29 AM, Uwe Ligges wrote:
[EMAIL PROTECTED] wrote:
What is the correct form to write statement meaning:
if (a==1) {b=2; c=3}; else {b=0; c=0};
if (a==1) {b=2; c=3} else {b=0; c=0};
That's valid, but is it correct form? The semicolon at the end is not
needed. I'd say it's a bad idea to use one, because it might give a
mistaken impression about the meaning of something like
a = 1
+ 2;
It's better to avoid semi-colons whenever possible, to make sure the C
parser in your brain throws an exception and lets the R parser take over.
Duncan Murdoch
Of course, Duncan is right, and shame on me for posting it in such a
pedagogically bad way on R-help, but I could not resist to simply remove
a single semicolon from the original question.
Thank you, Duncan, for pointing it out.
Uwe
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Re: [R] only need the p-value
This is how you go about doing this. summary(results)$coefficients[1,5] You will have to check this for you code. But the idea is that summary(results) is a list (?) and one of its components is called coefficients, which is a matrix. So the problem is just to extract one element of this matrix. I am not well versed with coxph so there may be some minor details I am missing, but that is the general idea (same as with lm, glm etc.). Ritwik. On 9/30/06, Boks, M.P.M. [EMAIL PROTECTED] wrote: Dear R users, I am calculating several cox proportional hazard models after each other (I know this is unusual, but I am just exploring the data). For the purpose of multiple testing correction I need to construct an array of these p-values. However since the output is not an array in itself, I cannot find a way to obtain the p-value only. attach(tms) goal-rep(0.7*FREQUENC[1:13],6) event- Surv(TIJD,FREQUENCgoal) results-coxph(event~ TYPETREA) summary(results) Call: coxph(formula = event ~ TYPETREA) n=76 (2 observations deleted due to missing) coef exp(coef) se(coef) z p TYPETREAnon-guided -0.826 0.4380.484 -1.71 0.088 exp(coef) exp(-coef) lower .95 upper .95 TYPETREAnon-guided 0.438 2.28 0.169 1.13 Rsquare= 0.041 (max possible= 0.829 ) Likelihood ratio test= 3.2 on 1 df, p=0.0737 Wald test= 2.91 on 1 df, p=0.088 Score (logrank) test = 3.08 on 1 df, p=0.0794 Does anyone now how to extract the p-value? Many thanks!, Marco __ 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. -- Ritwik Sinha Graduate Student Epidemiology and Biostatistics Case Western Reserve University [EMAIL PROTECTED] | +12163682366 | http://darwin.cwru.edu/~rsinha __ 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] Print/Save/Cat/Write list
Hi, I would like to write a list to an ascii file. I tried the following y - list(a = 1, b = c(TRUE,FALSE), c = oops) save(y, file=y.data, ascii=TRUE) # Not satisfactory print does not have a file= option cat cannot handle lists. write does not handle lists write.table converts it to a d.f Perhaps I could loop through the elements of a list and keep appending its elements to a file, but that will have a problem if any of the elements of the list is a list. I suppose there must be a simple function that does what I need. Sorry if I have missed anything obvious, my searches did not return anything useful. Thanks and regards, Ritwik. Here is my version platform i686-redhat-linux-gnu arch i686 os linux-gnu system i686, linux-gnu status major2 minor2.1 year 2005 month12 day 20 svn rev 36812 language R -- Ritwik Sinha Graduate Student Epidemiology and Biostatistics Case Western Reserve University [EMAIL PROTECTED] | +12163682366 | http://darwin.cwru.edu/~rsinha __ 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.
Re: [R] Print/Save/Cat/Write list
try: sink(y.data) y sink() On 9/30/06, Ritwik Sinha [EMAIL PROTECTED] wrote: Hi, I would like to write a list to an ascii file. I tried the following y - list(a = 1, b = c(TRUE,FALSE), c = oops) save(y, file=y.data, ascii=TRUE) # Not satisfactory print does not have a file= option cat cannot handle lists. write does not handle lists write.table converts it to a d.f Perhaps I could loop through the elements of a list and keep appending its elements to a file, but that will have a problem if any of the elements of the list is a list. I suppose there must be a simple function that does what I need. Sorry if I have missed anything obvious, my searches did not return anything useful. Thanks and regards, Ritwik. Here is my version platform i686-redhat-linux-gnu arch i686 os linux-gnu system i686, linux-gnu status major2 minor2.1 year 2005 month12 day 20 svn rev 36812 language R -- Ritwik Sinha Graduate Student Epidemiology and Biostatistics Case Western Reserve University [EMAIL PROTECTED] | +12163682366 | http://darwin.cwru.edu/~rsinha __ 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. -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem you are trying to solve? __ 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.
Re: [R] Print/Save/Cat/Write list
?sink __ 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.
Re: [R] Print/Save/Cat/Write list
thanks. Ritwik. On 9/30/06, jim holtman [EMAIL PROTECTED] wrote: try: sink(y.data) y sink() On 9/30/06, Ritwik Sinha [EMAIL PROTECTED] wrote: Hi, I would like to write a list to an ascii file. I tried the following y - list(a = 1, b = c(TRUE,FALSE), c = oops) save(y, file=y.data, ascii=TRUE) # Not satisfactory print does not have a file= option cat cannot handle lists. write does not handle lists write.table converts it to a d.f Perhaps I could loop through the elements of a list and keep appending its elements to a file, but that will have a problem if any of the elements of the list is a list. I suppose there must be a simple function that does what I need. Sorry if I have missed anything obvious, my searches did not return anything useful. Thanks and regards, Ritwik. Here is my version platform i686-redhat-linux-gnu arch i686 os linux-gnu system i686, linux-gnu status major2 minor2.1 year 2005 month12 day 20 svn rev 36812 language R -- Ritwik Sinha Graduate Student Epidemiology and Biostatistics Case Western Reserve University [EMAIL PROTECTED] | +12163682366 | http://darwin.cwru.edu/~rsinha __ 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. -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem you are trying to solve? -- Ritwik Sinha Graduate Student Epidemiology and Biostatistics Case Western Reserve University [EMAIL PROTECTED] | +12163682366 | http://darwin.cwru.edu/~rsinha __ 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.
Re: [R] Heteroskedasticity test
you may also try to levene test. Once again i think it is for a known change point. http://finzi.psych.upenn.edu/R/library/car/html/levene.test.html On 9/30/06, Achim Zeileis [EMAIL PROTECTED] wrote: On Fri, 29 Sep 2006, Alberto Monteiro wrote: Is there any heteroskedasticity test in the package? Something that would flag a sample like x - c(rnorm(1000), rnorm(1000, 0, 1.2)) The package lmtest contains several tests for heteroskedasticity, in particular the Breusch-Pagan test (and also the Goldfeld-Quandt test for known change point). Furthermore, some of the structural change tests in strucchange can be used to test for non-constant variances, e.g, the Nyblom-Hansen test. Z Alberto Monteiro __ 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-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. -- Ritwik Sinha Graduate Student Epidemiology and Biostatistics Case Western Reserve University [EMAIL PROTECTED] | +12163682366 | http://darwin.cwru.edu/~rsinha __ 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.
Re: [R] Print/Save/Cat/Write list
Check out ?dput On 9/30/06, Ritwik Sinha [EMAIL PROTECTED] wrote: Hi, I would like to write a list to an ascii file. I tried the following y - list(a = 1, b = c(TRUE,FALSE), c = oops) save(y, file=y.data, ascii=TRUE) # Not satisfactory print does not have a file= option cat cannot handle lists. write does not handle lists write.table converts it to a d.f Perhaps I could loop through the elements of a list and keep appending its elements to a file, but that will have a problem if any of the elements of the list is a list. I suppose there must be a simple function that does what I need. Sorry if I have missed anything obvious, my searches did not return anything useful. Thanks and regards, Ritwik. Here is my version platform i686-redhat-linux-gnu arch i686 os linux-gnu system i686, linux-gnu status major2 minor2.1 year 2005 month12 day 20 svn rev 36812 language R -- Ritwik Sinha Graduate Student Epidemiology and Biostatistics Case Western Reserve University [EMAIL PROTECTED] | +12163682366 | http://darwin.cwru.edu/~rsinha __ 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-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] plotting
Is there something in R that will display both observed values and their influence on calculated statistics? Anupam. __ 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.
Re: [R] a decimal aligned column
As requested:
The alignment problem came from calling format many times. Marc
Schwartz suggested a solution of putting my results in a vector and
then formatting. As I understand it the problem is that fixed-width
fields are only available from sprintf, while comma delineation is
only available from format, formatC and prettyNum. The
interrelationships are complicated (format calls prettyNum) and
require _very_ careful study. Here is Marc's solution with a few
changes. It left aligns the symbols and truncates, right aligns and
comma delineates the numbers. In short you get a nice table that is
easy to scan.
If I had one wish for format, it would be that it could set fixed
field width as well as minimum.
library(tseries)
# the symbols
symbols - c('spy', 'ise', 'oih', 'mot', 'pbj', '')
# set the start date to a year ago
Start - Sys.Date() - 366
# Pre-allocate dolVol as a vector
dolVol - numeric(length(symbols))
# Now get the values, assign to dolVol by indexing
for(line in seq(along = symbols))
{
a - get.hist.quote(instrument=symbols[line], start=Start,
compression=w, quote=c(Close, Volume),
quiet=TRUE)
dolVol[line] - mean(a[,1]) * mean(a[,2])
}
# Now for the initial common formatting,
# truncating the dolVol values to whole numbers
dolVol.pretty - format(trunc(dolVol), big.mark=,, scientific=FALSE,
justify=right, width=15)
# Now output
cat(paste(sprintf('%-4s',symbols), dolVol.pretty,
collapse = \n, sep = ), \n)
spy 8,770,399,023
ise 21,296,087
oih 1,415,206,983
mot416,923,148
pbj246,700
4,077,543,493
jab
--
John Bollinger, CFA, CMT
www.BollingerBands.com
If you advance far enough, you arrive at the beginning.
__
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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.
[R] Gradient problem in nlm
Hello everyone!
I am having some trouble supplying the gradient function to nlm in R for
windows version 2.2.1.
What follows are the R-code I use:
fredcs39-function(a1,b1,b2,x){return(a1+exp(b1+b2*x))}
loglikcs39-function(theta,len){
value-sum(mcs39[1:len]*fredcs39(theta[1],theta[2],theta[3],c(8:(7+len))) -
pcs39[1:len] * log(fredcs39(theta[1],theta[2],theta[3],c(8:(7+len)
a1-theta[1]; b1-theta[2]; b2-theta[3]
df.a1-sum(-mcs39[1:len] + pcs39[1:len]/(a1+exp(b1+b2*c(8:(7+len)
df.b1-sum( -mcs39[1:len] * exp(b1+b2*c(8:(7+len))) + (pcs39[1:len] *
exp(b1+b2*c(8:(7+len))) ) /(a1+exp(b1+b2*c(8:(7+len)
df.b2- sum(-mcs39[1:len] * exp(b1+b2*c(8:(7+len))) * c(8:(7+len)) +
(pcs39[1:len] * exp(b1+b2*c(8:(7+len))) * c(8:(7+len)) )
/(a1+exp(b1+b2*c(8:(7+len )
attr(value,gradient)-c(df.a1,df.b1,df.b2)
return(value)
}
theta.start-c(0.01 ,-1.20, -0.0005)
outcs39-nlm(loglikcs39,theta.start,len=50)
Error in nlm(loglikcs39, theta.start, len = 50) :
probable coding error in analytic gradient
Any light that can be shed on this would be highly appreciated.
Many thanks
Singyee Ling
[[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.
Re: [R] a decimal aligned column
For the last line you could also consider the print.data.frame method:
data.frame(Symbol = symbols, dolVol = dolVol.pretty)
or
data.frame(row.names = symbols, dolVol = dolVol.pretty)
capture.output or sink could be used if you want to direct it to a file.
On 9/30/06, BBands [EMAIL PROTECTED] wrote:
As requested:
The alignment problem came from calling format many times. Marc
Schwartz suggested a solution of putting my results in a vector and
then formatting. As I understand it the problem is that fixed-width
fields are only available from sprintf, while comma delineation is
only available from format, formatC and prettyNum. The
interrelationships are complicated (format calls prettyNum) and
require _very_ careful study. Here is Marc's solution with a few
changes. It left aligns the symbols and truncates, right aligns and
comma delineates the numbers. In short you get a nice table that is
easy to scan.
If I had one wish for format, it would be that it could set fixed
field width as well as minimum.
library(tseries)
# the symbols
symbols - c('spy', 'ise', 'oih', 'mot', 'pbj', '')
# set the start date to a year ago
Start - Sys.Date() - 366
# Pre-allocate dolVol as a vector
dolVol - numeric(length(symbols))
# Now get the values, assign to dolVol by indexing
for(line in seq(along = symbols))
{
a - get.hist.quote(instrument=symbols[line], start=Start,
compression=w, quote=c(Close, Volume),
quiet=TRUE)
dolVol[line] - mean(a[,1]) * mean(a[,2])
}
# Now for the initial common formatting,
# truncating the dolVol values to whole numbers
dolVol.pretty - format(trunc(dolVol), big.mark=,, scientific=FALSE,
justify=right, width=15)
# Now output
cat(paste(sprintf('%-4s',symbols), dolVol.pretty,
collapse = \n, sep = ), \n)
spy 8,770,399,023
ise 21,296,087
oih 1,415,206,983
mot416,923,148
pbj246,700
4,077,543,493
jab
--
John Bollinger, CFA, CMT
www.BollingerBands.com
If you advance far enough, you arrive at the beginning.
__
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-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] Setting NA
Is there a way to set NA values in R, without changing the dataframe? I would like to use different combinations of non-response values, as if they were NA for some of the computations. I don't want to change the dataframe each time I have to do this? Anupam. __ 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.
Re: [R] Need help to estimate the Coef matrices in mAr
I'm sorry, but I can't follow what you are asking. If you'd like more help, please provide commented, minimal, self-contained, reproducible code, as suggested in the posting guide www.R-project.org/posting-guide.html. http://www.R-project.org/posting-guide.html Please include a minimal data set, e.g., 10 simulated observations on 2 variables, with comments describing what you tried and what you don't understand about it. Hope this helps. Spencer Graves Arun Kumar Saha wrote: Dear Spencer, Thank you very much for your attention on my problem. According to your advice I did some home work on this problem, but unfortunately I could not solve my problem. Suppose I have a dataset of length 300 with 2 variables. And I want to fit a VAR model on this of order 2. I went through the function mAr.est and got understand that, here 'K' is a matrix with (300-2) rows and 7 columns. the first col. consists only 1, next two columns consist of lagged values of two variables with lag-length 2, next two col. consist of lagged value with lag length-1, and next two cols are for lag-length-0. Next, they add additional a 7-7 matrix to K. For this matrix diagonal elements are the square root of sum of square of elements of K (col. wise) and rest of the elements are 0. I feel that this matrix, that is added to K, is the key matrix for any type of modification that you prescribed. Therefore for experimental purpose I put NA against one of its off-diagonal elements. But I got error. However I cannot understand why they put such figures for diagonal and off-diagonal elements of that matrix. Can you suggest me any solution more specifically? Thanks and regards, Arun On 9/4/06, *Spencer Graves* [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote: Have you tried 'RSiteSearch(multivariate autoregression, functions)'? This produced 14 hits for me just now, the first of which mentions a package 'MSBVAR'. Have you looked at that? If that failed, I don't think it would be too hard to modify 'mAr.est' to do what you want. If it were my problem, I might a local copy of the function, then add an argument accepting a 2 or 3-dimensional array with numbers for AR coefficients to be fixed and NAs for the coefficients. Then I'd use 'debug' to walk through the function line by line until I figured out how to modify the function to do what I wanted. I haven't checked all the details, so I don't know for sure if this would work, but the function contains a line 'R = qr.R(qr((rbind(K, diag(scale, complete = TRUE)' which I would start by decomposing, possibly starting as follows: Z - rbind(K, diag(scale) I'd figure out how the different columns of Z relate to my problem, then modify it appropriately to get what I wanted. Another alternative would be to program it from scratch using something like 'optim' to minimize the sum of squares of residuals over the free parameters in my AR matrices. I'm confident I could make this work, even if the I somehow could not get it with either of the other two. There may be something else better, e.g., a Kalman filter representation, but I can't think how to do that off the top if my head. Hope this helps. Spencer Graves Arun Kumar Saha wrote: Dear R users, I am using mAr package to fit a Vector autoregressive model to my data. But here I want to put some predetermined values for some elements in coefficient matrix that mAr.est going to estimate. For example if p=3 then I want to put A3[1,3] = 0 and keep rest of the elements of coefficient matrices to be determined by mAr.est. Can anyone please tell me how can I do that? Sincerely yours, Arun [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch mailto:R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help 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. -- Arun Kumar Saha, M.Sc.[C.U.] S T A T I S T I C I A N[Analyst] RISK MANAGEMENT DIVISION Transgraph Consulting [ www.transgraph.com http://www.transgraph.com] Hyderabad, INDIA Contact # Home: (91-033) 25558038 Office: (91-040) 30685012 Ext. 17 FAX: (91-040) 55755003 Mobile: 919989122010 E-Mail: [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] [EMAIL PROTECTED] mailto:[EMAIL PROTECTED]
Re: [R] Setting NA
Would using the subset argument that is available in many functions (eg lm) achieve what you want? On 30/09/06, Anupam Tyagi [EMAIL PROTECTED] wrote: Is there a way to set NA values in R, without changing the dataframe? I would like to use different combinations of non-response values, as if they were NA for some of the computations. I don't want to change the dataframe each time I have to do this? Anupam. __ 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. -- = David Barron Said Business School University of Oxford Park End Street Oxford OX1 1HP __ 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] package e1071 - class probabilities
Vince: the implementations for both are different, so this might happen (although undesirably). Can you provide me an example with data (off-list)? David __ 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.
Re: [R] fitting a gaussian to some x,y data
Michael, I'm also playing with the nls function trying to get it to work with a Gaussian. My lines that I have at the moment and I hope will help you are class(fo - (x ~ (A/(sig*sqrt(2*pi)))* exp(-1*((bin-mu)^2/(2* sig^2) nls.AB - nls(fo,data=freq.tab, start= list(A=0.1*len, mu=0.01, sig=0.5), trace=TRUE) So first I create the eq to put into the nls function, my var are the freq.tab which is a list of some binned frequency into 0.1 units and the len is amount of features in the data. I'll say quickly that at the moment I am getting a 'singular gradient error'. I hope that this helps. Cheers. Paul Benton Research Technician Mass Spectrometry o The / o Scripps \ o Research / o Institute [[alternative HTML version deleted]] __ 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.
Re: [R] strange warning message
On 9/30/2006 3:31 PM, John C Frain wrote: I get a similar message when i start Sciviews R console. I do not get the message when I start R directly or through Tinn-r . If I load the libraries one by one the message is returned after svViews is loaded. I presume there is some problem with svViews. However it does not appear to have any consequences for my work. I use R 2.3.1 with Windows XP and I should have the latest versions of packages installed This does look like an svViews problem, possibly because it's loading an old binary copy of some object, or because it hasn't been recompiled for the release you're using. It may become a more serious problem when the use becomes defunct instead of deprecated: then the usage will generate an error. However, I believe we intend to maintain the ability to read old data files as long as possible, so you might not see any consequences. Duncan Murdoch John C Frain output of R session started with Sciviews R is a collaborative project with many contributors. Type 'contributors()' for more information and 'citation()' on how to cite R or R packages in publications. Type 'demo()' for some demos, 'help()' for on-line help, or 'help.start()' for an HTML browser interface to help. Type 'q()' to quit R. [Previously saved workspace restored] Loading required package: datasets Loading required package: utils Loading required package: grDevices Loading required package: graphics Loading required package: stats Loading required package: methods Loading required package: tcltk Loading Tcl/Tk interface ... done Loading required package: R2HTML Loading required package: svMisc Loading required package: svIO Loading required package: svViews During startup - Warning message: use of NULL environment is deprecated On 30/09/06, Duncan Murdoch [EMAIL PROTECTED] wrote: On 9/30/2006 1:00 AM, Tong Wang wrote: Hi Duncan: Thank you for your help last time, since I do not use NULL to indicate empty enviroment, I think I'm fine. And yes, I did upgrade my R version recently, but how comes I still get this warning for new files created and saved after that update ? Is there anyway to get rid of this message ? Please show some code that leads to the message. You shouldn't get it in new objects, but there could be a bug in R or in a package you're using. Duncan Murdoch Thanks a lot . best - Original Message - From: Duncan Murdoch [EMAIL PROTECTED] Date: Saturday, September 23, 2006 5:59 pm Subject: Re: [R] strange warning message To: Tong Wang [EMAIL PROTECTED] Cc: r-help@stat.math.ethz.ch On 9/23/2006 7:15 PM, Tong Wang wrote: Hi Everyone, I recently start to get this warning message, while loading files in to R. Could someone tell me what does it mean ? I am using R 2.3.0 with Emacs on WinXP. use of NULL environment is deprecated The files were saved in an earlier version of R, which used NULL to indicate the base environment. R is telling you that NULL is not a legal environment. It should be automatically converted to baseenv(). In a number of cases, people used NULL to indicate an empty environment (even though there was no such thing when NULL was used); if that's true for your code, then you'll need to fix it. emptyenv() now gives you an empty environment if that's what you really want. 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 and provide commented, minimal, self-contained, reproducible code. __ 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] Inner product
Hi, How do we find out the inner product norm of eigen vectors in R? Lets say we have eigen vectors : x1 = 1,2,3 and x2 = 2,-3,4 are there any functions buit in R which directly calculate the inner product norm of vectors? Thanks, Sonal. [[alternative HTML version deleted]] __ 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] error from pmvnorm
Hi all, Can anyone tell me what the following error message means? Error in mvt(lower = lower, upper = upper, df = 0, corr = corr, delta = mean, : NA/NaN/Inf in foreign function call (arg 6) It was generated when I used the 'pmvnorm' function in the 'mvtnorm' package. Thanks a lot. Yonghai Li __ 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.
Re: [R] Inner product
For inner product see ?%*%. There is a norm function in the Matrix package. On 30/09/06, Sonal Darbari [EMAIL PROTECTED] wrote: Hi, How do we find out the inner product norm of eigen vectors in R? Lets say we have eigen vectors : x1 = 1,2,3 and x2 = 2,-3,4 are there any functions buit in R which directly calculate the inner product norm of vectors? Thanks, Sonal. [[alternative HTML version deleted]] __ 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. -- = David Barron Said Business School University of Oxford Park End Street Oxford OX1 1HP __ 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] [R-pkgs] Reshape version 0.7.1
Reshape version 0.7.1 = Reshape is an R package for flexibly restructuring and aggregating data. It's inspired by Excel's pivot tables, and it (hopefully) makes it very easy to get your data into the shape that you want. You can find out more at http://had.co.nz/reshape What's new in this version? * A 25 page introductory vignette, also available at http://had.co.nz/reshape/introduction.pdf, which shows some of the many ways that you can use reshape. * The biggest change is that reshape now outputs regular data.frames, which should make it easier to use them for further analysis and transformation. * Added a fill argument to cast which specifies what value should be used for structural missings Various bug fixes and completion missing features: * fun.aggregate will always be applied if specified, even if no aggregation occurs * margins now work for non-aggregated data * cast now accepts a list of functions for fun.aggregate * very long formulas will now work in cast * fixed bug in rbind.fill * should be able to melt any cast form Please let me know if you have any comments, questions, or something isn't working right. Regards, Hadley ___ R-packages mailing list R-packages@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-packages __ 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.
Re: [R] Inner product
David Barron [EMAIL PROTECTED] writes: For inner product see ?%*%. There is a norm function in the Matrix package. Or crossprod(). Notice that this gives _squared_ norms when applied to a single vector. On 30/09/06, Sonal Darbari [EMAIL PROTECTED] wrote: Hi, How do we find out the inner product norm of eigen vectors in R? Lets say we have eigen vectors : x1 = 1,2,3 and x2 = 2,-3,4 are there any functions buit in R which directly calculate the inner product norm of vectors? Thanks, Sonal. [[alternative HTML version deleted]] __ 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. -- = David Barron Said Business School University of Oxford Park End Street Oxford OX1 1HP __ 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. -- O__ Peter Dalgaard Øster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 __ 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] counting a sequence of charactors or numbers
I have the following sequence of characters. These could be integers as well. For this problem, only two values are valid. S S S S S S W W W W W W W W S S S S S S S S W W W W W W W W S S S S S S S S S S S S S W W W W W W W W W I need to determine the count of the classes/groups in sequence. as 6,8,8,8,13,9 where the sum of these equal my total observations. Any help is greatly appreciated. Thank you Joe __ 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.
Re: [R] counting a sequence of charactors or numbers
?rle url:www.econ.uiuc.edu/~rogerRoger Koenker email [EMAIL PROTECTED] Department of Economics vox:217-333-4558University of Illinois fax:217-244-6678Champaign, IL 61820 On Sep 30, 2006, at 5:13 PM, Joe Byers wrote: I have the following sequence of characters. These could be integers as well. For this problem, only two values are valid. S S S S S S W W W W W W W W S S S S S S S S W W W W W W W W S S S S S S S S S S S S S W W W W W W W W W I need to determine the count of the classes/groups in sequence. as 6,8,8,8,13,9 where the sum of these equal my total observations. Any help is greatly appreciated. Thank you Joe __ 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-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.
Re: [R] problems with R and tckl/tk on Mac OS X
On 30/09/2006, at 8:00 PM, Rob J Goedman wrote: Thanks for catching this question. I'd missed Ingo's original email. Rcmdr does need X.11 and Tcl/Tk, although it uses the versions that come with Mac OS 10.4. Hence, as Alex indicates, there is no need to separately install these. Ingo, if you can't get it to work using John's link, let me know where you get stuck. R-Sig-Mac is an alias dedicated to Mac OS specific questions. 1. R-sig-mac is the place to go for these sorts of questions. This issue is being discussed there right now. 2. The instructions at http://socserv.socsci.mcmaster.ca/jfox/Misc/ Rcmdr/installation-notes.html are not correct and will mislead you. 3. The problems with Tcl/Tk are caused by the nice Aqua GUI. The tcl/tk package or any of its dependencies such as Rcmdr can be built on MacOS in one of two ways: a. use the Apple included (in 10.4.x) AquaTk. b. use an X11 version of Tk Packages built as a. cannot be run from within the R GUI but will launch happily from a command line. The problem is that AquaTk thinks it is the only GUI for the app and fights with the R GUI for possession of the menu bar and system events. They will work if you run R from a shell instead of the GUI. Packages built as b. can be run from inside the R GUI. So this is the standard for the CRAN binary distributions. The current R binary (2.3.1) includes an X11 Tcl/Tk. Make sure that it is installed. Bill Northcott __ 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.
Re: [R] How to repeat vectors ?
Here are some timings. From fastest to slowest we have: #3, #4, #1, #2 so, yes, the apply approach, even with the improvement (#2), is the slowest and, in fact, on this test is an order of magnitude slower than #3 which is the fastest one. m - matrix(1:4, 200) # test matrix # 1 - m must be numeric for this one to work system.time(for(i in 1:100)kronecker(m, rep(1,2))) [1] 2.93 0.29 3.34 NA NA # 2 system.time(for(i in 1:100)apply(m, 2, rep, each = 2)) [1] 5.22 0.09 5.73 NA NA # 3 - from Alex's post system.time(for(i in 1:100)m[rep(1:nrow(m), each = 2),]) [1] 0.50 0.07 0.60 NA NA # 4 system.time(for(i in 1:100)matrix(rbind(c(m), c(m)), nc = ncol(m))) [1] 1.54 0.20 1.77 NA NA On 10/1/06, Tong Wang [EMAIL PROTECTED] wrote: Hi, Thanks you guys for all the help. I learned a lot from it. It looks using apply() is not an efficient way, since all it does is looping through each row(or col) , which would be slow for large matrix, right ? cheers - Original Message - From: Gabor Grothendieck [EMAIL PROTECTED] Date: Saturday, September 30, 2006 4:54 am Subject: Re: [R] How to repeat vectors ? To: Tong Wang [EMAIL PROTECTED] Cc: r-help@stat.math.ethz.ch Here are 4 approaches in order from most compact to least. #1 only works for numeric matrices, # 2 is a shorter versio of your solution using rep.vec and # 3 is from Alex's post and is likely what I would use in practice. m - matrix(1:4, 2) # test matrix # 1 - m must be numeric for this one to work kronecker(m, rep(1,2)) # 2 apply(m, 2, rep, each = 2) # 2 # 3 - from Alex's post m[rep(1:nrow(m), each = 2),] # 4 matrix(rbind(c(m), c(m)), nc = ncol(m)) On 9/30/06, Tong Wang [EMAIL PROTECTED] wrote: I just figured out a way to do this: rep.vec - function(X,n) return(t(array(rep(X,n),c(length(X),n Then,apply(MyMatrix, 2, rep.vec,2) Is there a better way ? Is there an internal function to repeat a vector or matrix ? Thanks a lot. - Original Message - From: Tong Wang [EMAIL PROTECTED] Date: Friday, September 29, 2006 11:23 pm Subject: How to repeat vectors ? To: r-help@stat.math.ethz.ch Hi, If I have a matrix , say a11 a12 a21 a22 Is there a routine to get: a11 a12 a11 a12 a21 a22 a21 a22 Thanks a lot for any help. best __ 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-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] Can I avoid loops here ?
Hi, I have two lists of matrices, and I would like to get a list of term by term product, say, mylist1- list( X1,X2); mylist2-list(Y1,Y2) Need: mylist3-list(X1%*%Y1,X2%*%Y2) Is there a way that allows me to do this without loops ? Thanks a lot. best __ 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.
Re: [R] Can I avoid loops here ?
Try: mapply(%*%, mylist1, mylist2, SIMPLIFY = FALSE) Please provide self-contained examples as requested on the last line of every message to r-help. That means the data for X1, X2, Y1, Y2 should be included so one can run the code you post. On 10/1/06, Tong Wang [EMAIL PROTECTED] wrote: Hi, I have two lists of matrices, and I would like to get a list of term by term product, say, mylist1- list( X1,X2); mylist2-list(Y1,Y2) Need: mylist3-list(X1%*%Y1,X2%*%Y2) Is there a way that allows me to do this without loops ? Thanks a lot. best __ 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-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.
