Greg Snow wrote: > Here is another approach using transform and ave which I think is a > little simpler than the others suggested: > > >> new.data <- transform( iris, >> > + normSW = Sepal.Width / ave(Sepal.Width, Species, FUN=max), > + normSL = Sepal.Length / ave(Sepal.Length, Species, FUN=max) > + ) > > You can adjust it for your data. Hope this helps, > > Yes, I was about to suggest the same. Or
...ave(Sepal.Width, Species, FUN = function(x) x/max(x)).. Should we have a competition for a more evocative name than "ave"? -- O__ ---- Peter Dalgaard Øster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 ______________________________________________ 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.
