[R] reconstruction of data after PCA and interpolation

Dear all, I have a matrix of size N x M. I purchase a PCA analysis through prcomp function. Then I keep the H eigenvectors which explain 90% of the total variance and interpolate each vectors of the matrix H x M, to obtain a new matrix of size H x K (K M). My question is : from this last

Re: [R] Linux configuration (Ubuntu)

Brian Edward a écrit : Hello all, I have been a R user for about a year now, running on a MS Windows machine. I am in the process of making a complete switch to open-source. Linux is a new world to me. Ubuntu was my selection of the various distributions. Please pardon this very basic

[R] Negative value on ternaryplot

Dear all, I found a wonderful package (vcd) able to plot ternary diagrams, i.e. ternaryplot (thanks D. Meyer). The problem is that one of three variable has negative values. If I use the ternaryplot function but some points are outside the triangle, as value en negative. Is it possible to

[R] autocorrelation test

Hi all, I would like to test the relevance of a vector field (i.e. if the vectors are organized or not). To do so, I would like to use an autocorrelation test, so that I have two questions: - is the Watson test applicable to that perpuse ? - is the kuiper test applicable to that purpuse ?

[R] One sample test

Hi all, I would like to test the uniformity (or no uniformity) of a vector field. To do so, I would like to use a ks.test (Kolmogorov-Smirnov) but don't know what value to give for the second parameter in case of a one sample test, as it is my case here. An other question is, does any body

[R] Compilationerror at installation of packages

Dear all, I did post a message about problems on installing a package (gstat) which ends with a compilation error: ** libs gcc -I/usr/lib/R/include -mieee-with-inexact -fPIC -g -O2 -c block.c -o block.o gcc -I/usr/lib/R/include -mieee-with-inexact -fPIC -g -O2 -c chfactor.c -o

[R] Compilation package error

Dear all, I tried to install gstat package and add the following compilation error : * Installing *source* package 'gstat' ... creating cache ./config.cache checking for gcc... gcc checking whether the C compiler (gcc ) works... yes checking whether the C compiler (gcc

[R] geometric mean regression

Hi, is it possible to perform a geometric mean regression with R ? Thanks. Emmanuel Poizot Cnam/Intechmer B.P. 324 50103 Cherbourg Cedex Phone (Direct) : (00 33)(0)233887342 Fax : (00 33)(0)233887339

[R] Classification of an image

Dear all, I need to do a automatic classification of a raster file (image) using training samples. I would like to know if there is a library able to do such a work. Thanks Emmanuel Poizot __ R-help@stat.math.ethz.ch mailing list

[R] array construction

Hi all, I've got a file of the following format: X Y Z u v w 0 0 0 x x x 0 0 1 x x x 0 0 2 x x x .. .. .. .. .. .. 0 1 0 x x x 0 1 1 x x x 0 1 2 x x x .. .. .. .. .. .. 1 0 0 x x x 1 0 1 x x x 1 0 2 x x x etc x stand for

[R] R from outside program

Hi all, I'm writing a program in C++ in witch there should be some graphical outputs. To do so, I would like to use R with the command : R --no-save cmdfile.R , where I put the R graphic commands in the cmdfile.R file. I call R from my C++ code but as R seems to run in batch mode, there are no

[R] Alpha

Hello, I just install red-hat 7.2 for alpha station. I downloaded R-1.8.1-1.alpha.rpm, but unable to install it. I need the libblas.so.3 library. I did have a look around and did not find where to get that library for linux alpha version. -- regards

[R] Postscript PBs

Hi, I use R 1.6.2 under Mandrake9.0. I've got a problem with the postscript files I try to creat. When I look to the file with ghostview it's ok. When I want to print it, I've got a blank page or a black page (fill of black encre) I changed the printer (guessing it was my driver printer), it was

[R] Correlation test

Hi, I need to test multiple correlation coefficient in a same time, what's the best test for that and are should I do under R ? Thanks -- Cordialement Emmanuel POIZOT Cnam/Intechmer Digue de Collignon 50110 Tourlaville Tél : (33)(0)2 33 88 73 42 Fax :

[R] Wavelets correlation test

Hello, I use wavethresh packages to perform wavelet analysis. In particular, I would like to compare 2 signals (vectors) after a wavelet decomposition. I would like to use cor.test function, but this function acts on the entire vector values. I plan to perform a cor.test on each level of the

[R] Wavelets analysis

Hello, I would like to compare 2 vectors representing 2 signals. To do so, I use a wavelet decomposition (wavethresh package). I then try to find if the such transformed vectors are equivalent or not. I can do for example a simple a correlation test on wavelets coefficents, but it seems to me