Dear Arun,as usuall you were spot on. i tried the following
>lapply(seq_len(ncol(e)), function(i) {>a<-e[,(e[i]:444)] >a[,c(TRUE, rep(FALSE,36))] >}) but it never worked. thanks for your kind help.lots of love elisa > Date: Mon, 24 Dec 2012 22:40:08 -0800 > From: [email protected] > Subject: Re: [R] for loop not working > To: [email protected] > CC: [email protected]; [email protected] > > HI Eliza, > > You could try this: > set.seed(15) > mat1<-matrix(sample(1:2000,1776,replace=TRUE),ncol=444) > colnames(mat1)<-paste("Col",1:444,sep="") > res<-lapply(seq_len(ncol(mat1)),function(i) mat1[,seq(i,444,37)]) > > #If you want only this from 1:37, then > res1<-lapply(1:37,function(i) mat1[,seq(i,444,37)]) > > > A.K. > > > > ----- Original Message ----- > From: eliza botto <[email protected]> > To: "[email protected]" <[email protected]> > Cc: > Sent: Tuesday, December 25, 2012 12:03 AM > Subject: [R] for loop not working > > > dear R family,i have a matrix of 444 columns. what i want to do is the > following. > 1. starting from column 1 i want to select every 37th column on the way. more > precisely i want to select column 1, 38,75,112,149 and so on. > 2.starting from column 2, i again want to select every 37th column. which > means 2,39,76,113,150 and so on. > similarly starting from 3 till 37th column. > i have tried following loop command which is not working.can anyone plz see > whats wrong in that? > >for (i in 1:37) > > >{ > > > >a<-e[,e[i]:444] > > > >} > > > > lapply(seq_len(1), > function(i) { > > > >a[,c(TRUE, rep(FALSE,1))] > > > >}) > extremly sorry for bothering you once again.. > eliza > [[alternative HTML version deleted]] > > ______________________________________________ > [email protected] 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]] ______________________________________________ [email protected] 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.
