Try the RColorBrewer package, with function ?brewer.pal You probably want a Qualitative palette, the details are in that function's help page.
Cheers, Mike. On Tue, Dec 13, 2011 at 10:14 AM, Etienne B. Racine <etienn...@gmail.com> wrote: > I'm looking for a palette that would maximize the discrepancy with > neighbouring elements. > > I have a raster image of objects tagged with integers. I'd like to > highlight the different objects by using a palette that would maximize this > difference with neighbours as close numbers tend to be neighbours. Of, > course, I don't expect this to be color-blind safe are even beautiful, but, > I'd like to have a good chance of separating neighbours. > > It looks a bit like : > > x <- structure(c(1, 1, 2, 2, 2, 2, 1, 1, 1, 2, 2, 2, 1, 1, 1, 1, 3, > 2, 1, 1, 1, NA, NA, 3, 1, 4, 4, 3, 3, 3, 4, 4, 3, 3, 3, 3), .Dim = c(6L, > 6L)) > image(x) > # i've tried things like > image(x, col = sample(rainbow(5))) > > But with number of objects increasing (~80), I tend to have same colours > (or very close ones) as neighbours. > > Does that palette exist ? > > Thanks, > Etienne > > [[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. -- Michael Sumner Institute for Marine and Antarctic Studies, University of Tasmania Hobart, Australia e-mail: mdsum...@gmail.com ______________________________________________ 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.
