Scott Chamberlain <scttchamberlain4 <at> gmail.com> writes: > > How about this: > > ddply(test.set, .(site), colwise(max)) > On Wednesday, May 11, 2011 at 11:46 AM, Justin wrote: > > test.set<-data.frame(site=1:10,x=.Random.seed[1:100],y=rnorm(100)) > > means<-ddply(test.set,.(site),mean) > > means > > [[alternative HTML version deleted]] > >
Thats the ticket! So mean is already set up to operate on columns but max and min are not? I guess its not too important now I know ... but whats going on in the background that makes that happen? ______________________________________________ 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.
