That's great, thanks! Jon
Gabor Grothendieck wrote: > > Try this: > > # test data > DF <- data.frame(a = 1:9, a = 21:29, b = 31:39, b = 41:49, check.names = > FALSE) > > t(apply(DF, 1, tapply, names(DF), mean)) > > It gives a matrix so use as.data.frame on that if you need a data frame > > > -- View this message in context: http://www.nabble.com/averaging-pairs-of-columns-in-a-dataframe-tp19181319p19184350.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.
