Hi, I don't know how to get R to use the hex codes, but as an alternative strategy you can use colors() to get a (much longer than 8) list of all the colors that R "knows", and use that with your index:
plot(x, y, col=colors()[datacolor]) It takes a bit of fiddling to get distinguishable colors that you like, but not too hard. Conveniently, there's a color chart here: http://research.stowers-institute.org/efg/R/Color/Chart/ You can also try rainbow() and it's relatives (describe in ?rainbow). Sarah On Fri, Oct 3, 2008 at 3:10 PM, kerfuffle <[EMAIL PROTECTED]> wrote: > > hi folks, > > this is driving me up the wall. Apologies for posting twice in the same > week, I'm writing up a thesis. I wish to color-code some dots in an xy > plot. I've got a csv file with various elements, one of which is the > color-key (with the header 'color'). If the color-key is decimal (eg. > 1,2,3) then I can use > plot (X ~ Y, col=data$color) > The problem, however, is that using decimal numbers I can only produce 8 > colors. It starts to recyle them after that (so, if possible values of my > color column are 1,2,3,4,5,6,7,8,9,10,11, the values 1 and 9 both produce > red, 2 and 10 produce black). However, I knew I could get more colors by > using hexadecimal (tested with the legend) So, I carefully produced a csv > file with hexadecimal values instead of decimal ones (eg. elements in the > column are #ffffff, #ff0000) but if I use col=data$color it doesn't work, > the entire plot is white. If I use these set of hexadecimal values in the > legend, it works fine and I get lovely colors. > > I could use pch, but I'm already using symbols for another key. > > Grrr. What am I missing? > > Thanks! -- 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.
