I often need to "combine" data frames, sometimes "vertically" and other times "horizontally".
When it "better" to use merge? When is it better to use rbind or cbind? Are there clear pros and cons of each approach? --------------------------------- [[alternative HTML version deleted]] ______________________________________________ R-help@stat.math.ethz.ch 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.