Hi Chris, On Tue, Nov 15, 2011 at 1:47 PM, Chris82 <rubenba...@gmx.de> wrote: > Hi R users, > > I want to colored points by their value > > for example: > > x <- c(1,2,3,4) > y <- c(1,2,3,4) > z <- c(2,3,4,9) > > y and x are coordinates > > z is the value of the coordinates > > points(x,y,col= rainbow(z))
In the general sense: plot(x, y, col=rainbow(length(unique(z)))[as.factor(z)]) converting z to a factor to use as an index is just a quick way to convert z to sequential values 1,2,3,4 rather than 2,3,4,9 and to ensure that multiple and unsorted values use the correct color. If z contains only sequential values, that bit is unnecessary. I like RColorBrewer for things like this, rather than rainbow, but it depends on what you're trying to do. Sarah > something like that > > But haven't found any solution at the moment. > > Thanks. > > Chris > > -- Sarah Goslee http://www.functionaldiversity.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.
