Hi Frederik, Not exactly clear how you want them sorted, but one of these two is probably what you want:
mat <- matrix(100:1, ncol=10) mat.1 <- apply(mat, 2, sort) mat.2 <- mat[order(10:1),] Best, Ista On Fri, Feb 26, 2010 at 12:41 PM, frederik vanhaelst <frederik.vanhae...@gmail.com> wrote: > Hello, > > i have a 50*100 matrix, with real numbers. How do i sort each column? > Now i sort it with a for-loop but this take a lot of time... > > Thank you, > > Frederik > > [[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. > -- Ista Zahn Graduate student University of Rochester Department of Clinical and Social Psychology http://yourpsyche.org ______________________________________________ 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.
