robgriffin247 <robgriffin247 <at> hotmail.com> writes: > > Hi, > I'm sure there is a pretty simple answer to this but I have had my head > buried in the R book and on help pages for a while now and I've not made any > progress. > > In simple terms: > I have 2 columns of data, column A and column B. I want to create a new > column (C) and fill it with the largest value from of A or B on each row. >
sounds like you want data$C <- pmax(data$A,data$B) (or data <- transform(C,pmax(A,B))) ______________________________________________ R-help@r-project.org 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.
