On Sun, Feb 10, 2013 at 5:31 AM, catalin roibu <catalinro...@gmail.com> wrote: > Dear R users, > I have a problem. I don't know how to select the top 10 (n) values for each > classes.
Assuming that by top n values in each group you mean the first n rows in each group then: n <- 5 dat1[ave(dat1$cls, dat1$cls, FUN = seq_along) <= n, ] -- Statistics & Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.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.
