Try this: aggregate(x$rank, list(cno=x$cno), max)
On 7/24/08, Daniel Wagner <[EMAIL PROTECTED]> wrote: > Dear R users, > > I have a dataframe with lot of duplicate cases and I want to delete duplicate > ones which have low rank and keep that case which has highest rank. > e.g > > > df1 > cno rank > 1 1342 0.23 > 2 1342 0.14 > 3 1342 0.56 > 4 2568 0.15 > 5 2568 0.89 > > so I want to keep 3rd and 5th cases with highest rank (0.56 & 0.89) and > delete rest of the duplicate cases. > Could somebody help me? > > Regards > > Daniel > Amsterdam > > > > > > > > > > Send instant messages to your online friends http://uk.messenger.yahoo.com > [[alternative HTML version deleted]] > > > ______________________________________________ > 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. > > -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O ______________________________________________ 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.
