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Dear R-helpers, How come that in the following code the rnorm() function is evaluated only once for each branch of the 'ifelse' ? x <- rnorm(10) y1 <- ifelse(x > 0, rnorm(1) , rnorm(1)) What is the right way to make it called/evaluated for each row, apart from a 'for' loop ? Thanks, Jacques.

Dear all I wrote a routine. At the end of each cycle of the loop I would like to save the result (plot) in a postcriptfile. Of course if I just use dev.print in the following way: dev.print(device=postcript, 'c:/Rfigures/plot_1.ps") I overwrite my results with the second cycle of the loop. I suppose there is a way to define the file name so that several plots are

Hello, I've just installed R (Linux) and I have some problems with graphical viewing.Could you, please, explain me why I can't see graph when I just want to make a plot ? Many thanks ! St?phanie Langevin Helios BioSciences ---------------------------------------------------------------- Ce service de mailing vous est offert par http://www.freesurf.fr. FreeSurf, votre acces ADSL a

Hello list, I have two vectors x and x2: x=runif(10) x2=runif(10) and one vectors with their names : my.names=c("x","x2") I would like to cbind these two vectors using their names contained in the vector my.names. I can create a string with comma ncomma=paste(my.names,collapse=",") and now, I just need a function to transform this string into a adequate

Le Jeudi 11 Avril 2002 21:09, m.ibarra at cdcixis-na.com a ?crit : > I was curious to know if you had any luck in getting openssh's sftp > server properly configured to allow chrooted sftp logins? I have had > no success and need something quickly. Dear Mike, Unfortunately, I did not succeed to have it work. I got in contact with James Dennis <jdennis at law.harvard.edu>, who

Hello list, Sorry, these questions are not directly linked to R. If I consider an indefinte real matrix, I would like to know if the symmetry of the matrix is sufficient to say that their eigenvectors are real ? And what is the conditions to ensure that eigenvectors are real in the case of an asymmetric matrix (if some conditions exist)? Thanks in Advance, St?phane DRAY

Hello, suppose I have a list with matrices: a=list(x1=matrix(rnorm(10),5,2),x2=matrix(rnorm(10),5,2),x3=matrix(rnorm(10),5,2)) I want to compute for all combination of xi and xj (x1,x2 x1,x3 and x2,x3) a value. This value is given for the pair x1,x2 by trace(x1%*%t(x1)%*%x2%*%t(x2)) / trace(x1%*%t(x1))*trace(x2%*%t(x2)) I know that product matrices t(xi)%*%xi can be obtained by:

Hello, I have a question that is not directly related to R ... but I try to do it in R ;-) : I would like to generate a matrix Q satisfying (for a given Z, X and W) the two following conditions: t(Q)%*%Q=Z (1) XQ=W (2) where: Q is m rows and r columns X is p rows and m columns D is p rows and r columns C is r rows and r columns with m>p,r e.g: m=6, p=2 r=3

Hi Now a more theoretical question. I have two correlation matrices - one of a set of variables under a particular condition, the other of the same set of variables under a different condition. Is there a statistical test I can use to see if these correlation matrices are "different"? Thanks Mick

I am not sure a previous e-mail reached the list (no mail aknowledgement from R-boundle etc.). The question was how to write polygon or segment coordinates into a shapefile set or any other ArcGIS supported format. The library shapefiles seems to do something but the documentation is a bit beyond of my mind.... and I cannot get the meaning of the functions write**** and its application to the case

You must mean your most wanted feature. Mine is the integration of Simon's GSS patches. Nico -- > -----Original Message----- > From: Jean-Michel POURE [mailto:jm.poure at freesurf.fr] > Sent: Friday, May 17, 2002 7:35 AM > To: Markus Friedl; openssh-unix-dev at mindrot.org > Subject: OpenSSH 3.2.2 released : chroot > > > Le Vendredi 17 Mai 2002 00:36, Markus

What I am doing : create a simple correlation matrix on 41 variables, then plot an heatmap with this program : library(gplots) mat<-cor(temp.alln,use="pairwise.complete.obs") hm<-heatmap.2(mat,symm=T) HM<-format(round(mat[hm[[1]],hm[[2]]],2)) library(RColorBrewer) brewer.pal(10,"Spectral")->mp heatmap.2(mat, symm = TRUE, col = mp,

Hello list, I have used scan function to import data into R. I have done some analysis and find strange results. I have found my problem : when importing data with scan, this can slightly modify the data : > write(c(0.251,3.399,-0.481,0.266),"essai.txt") > scan("essai.txt") Read 4 items [1] 0.251 3.399 -0.481 0.266 > print(scan("essai.txt"),17) Read

Hello list, I have 3 matrices with same dimension : > veca=matrix(1:25,5,5) > vecb=matrix(letters[1:25],5,5) > vecc=matrix(LETTERS[1:25],5,5) I would like to obtain a new matrix composed by alternating rows of these different matrices (row 1 of mat 1, row 1 of mat 2, row 1 of mat 3, row 2 of mat 1.....) I have found a solution to do it but it is not very pretty and I wonder if I

>> you are better off using the vogg orbis codec. speex is meant >> specifically for telephonic voice. it takes a single human voice and >> compresses it well. it cannot handle muliple voices or music very well. >That part is true, so of course it depends on the application. I guess I >should have added that for most applications, 16 kHz is recommended >instead of 44.1

On Mon, 17 Jan 2005, Jean-Marc Valin wrote: > > 0) Is it possible to manipulate voice data representing more than > > the frame size of encoder (this seems possible in Speex Java code > > used until now). > > Speex itself manipulates audio one frame at the time, but what you do > after that if up to you. > What about the section 4.5 of the

Hi All, Almost all my question is in the subject. I have written the following small program and I get an error message when I try to use SPEEX_GET_QUALITY. This functionality seems not to be used in speexenc.c or speexdec.c. I would appreciate any hints. best regards, Alain Aubord ---------------------------test.c--------------------------------------- #include <stdio.h> #include

Hello, I have been using flac for some time and it works really great for me. I have tried the plugins for winamp2 and xmms and noticed that it does display the vorbis tags but you cannot edit them yet. It would also be cool to show some infos like md5sum, numbers of frames etc. in the plugin status window. Are these features under development or not very high priority?

Dear R-users How can I get the eigenvalues out of an lda analysis? thanks a lot christoph -- Christoph Lehmann <christoph.lehmann at gmx.ch>

Hi, I am looking for some code for Moran's I. Has anyone previously done this? I have been unable to find it in the search engines. James