Hi Sarah, thanks a lot for this peace of code.
Is it possible to give the second sequence of "B" in your second example (data frame b) the numbers 6, 7 and 8 instead of 1, 2 and 3 again? In my real data I have more columns than only those two and sometimes the are sorted differently so that column name rather looks like your second example (data frame b) rather than your first one. Regards -- View this message in context: http://r.789695.n4.nabble.com/Add-number-series-to-data-frame-tp4450495p4450656.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.