ok, i have it - match() 10x all again! :) -- View this message in context: http://r.789695.n4.nabble.com/group-by-in-data-frame-tp3324240p3325269.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.
