Re: [R] For loop indicies

Hi, what about this: C <- 0:499 for (i in C) { cat (i," ") } Best regards, Andris Jankevics AIO Groningen Bioinformatics Centre Groningen Biomolecular Sciences and Biotechnology Institute University of Groningen Kerklaan 30, Haren, 9751 NN, The Netherlands On Mon, Dec 12,

Re: [R] Checking existance of a directory

Hi, something like this perhaps, if("myfolder"%in%dir()==FALSE) dir.create("myfolder") Command dir.create() is not overwriting an existing folder. Best regards, Andris On Fri, Oct 29, 2010 at 12:08 PM, Ron Michael wrote: > Hi all, I am wondering is there any way to check whether some Director

Re: [R] What an element in loading is missing? (princomp)

Hi, ?loadings print (pca_result$loadings,cutoff=0) unclass(pca_result$loadings) -- Andris Jankevics AIO Groningen Bioinformatics Centre Groningen Biomolecular Sciences and Biotechnology Institute University of Groningen Kerklaan 30, Haren, 9751 NN, The Netherlands On Mon, Oct 19, 2009 at 4:34

Re: [R] (no subject)

Actually that is stated in paper abstract: http://www.krebsregister.saarland.de/improve/periodR_en.html Andris 2009/10/1 "Jens Oehlschlägel" : > Hi, > Does anyone know where the following package is available: > > Holleczek B, Gondos A, Brenner H. > PeriodR - an R package to calculate long term

Re: [R] "biplot" graphical options?

Hi, You can make a biplot on Your own, it is not so hard. And in this case You can change parameters for every low level function as You wish. PC <- prcomp (iris[,1:4]) lambda <- PC$sdev * sqrt(nrow(PC$x)) plot (t(t(PC$x)/lambda),pch=16,col=as.numeric(iris[,5])) par (new=T) Rot <- t(t(PC$rotation)

Re: [R] What package I use to draw 3D plot after plsda?

Hi, You want something like this? library (pls) data(yarn) library (scatterplot3d) yarn.pls <- plsr(density ~ NIR, 6, data = yarn, validation = "CV") palette (rainbow(length(yarn$density))) scatterplot3d (yarn.pls$scores[,1:3],pch=16,color=1:length(yarn$density),cex.symbols=2) ?scatterplot3d

Re: [R] I need your help about plsr

Hi, plsr funtion in pls package are intented for calculation of regression models. You must define your Y matrix as bianary identification matrix or You can just use plsda function from R's caret package. http://caret.r-forge.r-project.org/Classification_and_Regression_Training.html Best regards,

Re: [R] Formatting numbers

Hi, try this A <- c(1:1000) A <- paste ("000",A,sep="") substr (A,nchar(A)-3,nchar(A)) Best regards, Andris Jankevics On Mon, Apr 27, 2009 at 12:35 PM, Mario dos Reis wrote: > I've been trough the R documentation for about half an hour and it's not >

Re: [R] ncdf,RNetCDF

Hi, just quick "googling" gave me the hint that it can be ralated to SE Linux restrictions of Fedora linux. Just try to disable SE Linux feature. http://www.appistry.com/community/forums/content/cannot-restore-segment-prot-after-reloc-permission-denied Best regards, -- Andris subramanian wrot

Re: [R] PLS regression on near infrared (NIR) spectra data

Hi, take a look on pls package and it's documentation, there are examples also for NIR data. http://mevik.net/work/software/pls.html Article form "Journal of Statistical Software" http://www.jstatsoft.org/v18/i02 Also "Caret" package can be used to evaluate pls and other regreesion models: htt

Re: [R] Clustering large data matrix

only 15% of the variability. > So, my questions are 1) is clara() a proper way to analyze such a large > data set? and 2) Is there an appropiate method for graphic plotting of > my data, that takes into account the whole variability if my data, not > just two principal components? >

Re: [R] data structure for plsr

.0 ... > $ train : logi TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE > TRUE ... > > I think the important structure for my application is in the NIR line. > Now that I "know" what the structure is, what does it mean, and how do I > get my data into the same