[R] updating columns using other column as reference

Dear R-gurus, Just supose I have a dara.frame that looks like myDF-read.table(stdin(),head=T,sep=,) codID,namesp,k1,k2,k3,k4 1,spA,2,5,6,3 2,spB,4,5,4,6 3,spC,2,1,5,6 4,spC,5,4,3,2 5,spD,1,2,3,4 6,spE,2,4,3,1 I need to update the columns k1-k4 with the namesp, but considering the math between

Re: [R] updating columns using other column as reference

Milton, Try this: myDF[grep(k, names(myDF))] - sapply(myDF[grep(k, names(myDF))], function(idx)myDF$namesp[idx]) On Mon, Oct 19, 2009 at 2:03 PM, milton ruser milton.ru...@gmail.com wrote: Dear R-gurus, Just supose I have a dara.frame that looks like myDF-read.table(stdin(),head=T,sep=,)

Re: [R] updating columns using other column as reference

Amazing. Thanks a lot milton On Mon, Oct 19, 2009 at 12:55 PM, Henrique Dallazuanna www...@gmail.comwrote: Milton, Try this: myDF[grep(k, names(myDF))] - sapply(myDF[grep(k, names(myDF))], function(idx)myDF$namesp[idx]) On Mon, Oct 19, 2009 at 2:03 PM, milton ruser