On Thu, 14 Oct 2004 [EMAIL PROTECTED] wrote: > Hello > > I am looking for a function which performs the same thing as rev but on a > matrix rather then a vector, based on one column. > I'd be happy to read the man page if such a function exists.
If I understand you, it is easy to do by indexing, but `based on >one< column' puzzles me and I take it you want each column reversed. A <- matrix(1:20, 4, 5) A[4:1, ] or more generally A[rev(seq(len=nrow(A))), ] If that is not what you mean, please give us an example to look at. -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
