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

2009-10-19 Thread milton ruser
Amazing. Thanks a lot milton On Mon, Oct 19, 2009 at 12:55 PM, Henrique Dallazuanna wrote: > 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 > wrote: > > Dear R-g

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

2009-10-19 Thread Henrique Dallazuanna
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 wrote: > Dear R-gurus, > > Just supose I have a dara.frame that looks like > > myDF<-read.table(stdin(),head=T,sep=",") > codID,na

[R] updating columns using other column as reference

2009-10-19 Thread milton ruser
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