search for: vectorx

Hi List, I want replace characters within a vector. Outside R I could use sed, but I'd like to automate it in R. For example vectorx xxxyyz xxxyyza xxxyyzzb I want to change to: vectorx aaayyz aaayyza aaayyzzb The obvious replace command only deals with whole data entries? Any hints would be appreciated. Thanks Herry

Dear statisticians, I would like to save results for a "for loop" in a vector previously created. My result would be of class "matrix". I tried the following script: Script: #Creation of a previous vector n.Tree<-2 VectorX<-rep(1,n.Tree) #loop for (i in 1:2) { Ti<-MatOccurTree[Tree[i],1] #number of observation for Tree i Xi<-matrix(data=1,nrow=Ti,ncol=2) Xi[,2]<-treedata2$lnE[IdentTree==Tree[i]] VectorX[i]<-Xi } Console: > VectorX[i]<-Xi Warning message: le nombre d'objets à remplacer n...

Dear useRs, I'm writing regular survey reports using Sweave. Each report has several sections along the lines of: \section*{Disease X} <<MapX,fig=TRUE,echo=FALSE>>= image(vectorx,vectory,matrixz) @ Notes with or without Sexpr{a}. \vfill \pagebreak \section*{Disease Y} <<MapY,fig=TRUE,echo=FALSE>>= ...etc. Often one or more of the diseases is not observed (all values in matrixz are 0), in which case I would prefer not to display the section at all. Does a...

Hi, I want to generate a number of vectors and store them with different names, like this: x=1 while (x<100) { vector#x# = rnorm(100) x=x+1 } where each vector has, at its hand, instead of #x# a number which goes from 1 to 99. How can I do this? Thanks Gabriele Zoppoli, MD Ph.D. Fellow, Experimental and Clinical Oncology and Hematology, University of Genova, Genova, Italy Guest