Thanks to all who responded!
I've taken those responses, and found out what works: myNumericColumns<-mydataframe[sapply(mydataframe, is.numeric)] produces a subset of columns with just the numeric vectors. Sincerely, Barry [[alternative HTML version deleted]] ______________________________________________ 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.