[R] help to split a ID column in a data.frame and create a new ID column

Dear Researchers, I have a data.frame with 2 columns like this: mydf - data.frame(value=c(1,2,3,4,5),ID=c(Area_1,Area_2,Area_3,Area_4,Area_5)) mydf value ID 1 1 Area_1 2 2 Area_2 3 3 Area_3 4 4 Area_4 5 5 Area_5 I need to convert the *ID *in the following version

Re: [R] help to split a ID column in a data.frame and create a new ID column

Hi Gianni, Thank you for the reproducible example! Try mydf$newID - with(mydf, gsub(_, Sample, ID)) mydf HTH, Jorge.- On Fri, Mar 16, 2012 at 7:54 AM, gianni lavaredo wrote: Dear Researchers, I have a data.frame with 2 columns like this: mydf -