> with(dat, data.frame(X=rep(X, each=2), Y=unlist(strsplit(Y, split=" - "))))
str_split_fixed would be a bit safer here. Hadley -- Chief Scientist, RStudio http://had.co.nz/ ______________________________________________ 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.