Yep. There are methods for: > methods(unique) [1] unique.array unique.data.frame unique.default [4] unique.matrix unique.numeric_version unique.POSIXlt
and for the matrix and data.frame methods, unique rows will be returned by default. For array and matrix objects, you can change the MARGIN argument to a different value (eg. 2 for columns, etc.). See ?unique for more information, notably the Details and Value sections. Marc On Dec 27, 2012, at 2:48 PM, Emmanuel Levy <emmanuel.l...@gmail.com> wrote: > I did not know that unique worked on entire rows! > > That is great, thank you very much! > > Emmanuel > > > On 27 December 2012 22:39, Marc Schwartz <marc_schwa...@me.com> wrote: >> unique(t(apply(cbind(v1, v2), 1, sort))) ______________________________________________ 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.