jim holtman wrote:
yourDF <- cbind(yourDF, f=yourDF$a+yourDF$b, g=yourDF$a * 3, h=yourDF$c + yourDF$d)
Thanks Jim, I also learned about the transform() method from Erik which will also work beautifully. Esmail ______________________________________________ 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.
