> The following example does what you want using ddply: > > library(plyr) > edfPerGroup = ddply(df, .(Group), summarise, edf = edf(Value), Value = > Value)
Or slightly more succinctly: ddply(df, .(Group), mutate, edf = edf(Value)) Hadley -- Assistant Professor / Dobelman Family Junior Chair Department of Statistics / Rice University 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.