Hi all, The developing metapost driver will handle the plots in demo(graphics) putting the lines in the right places, and so on. But the colors are ... to put it politely ... suboptimal :) I can mail an Rplots.mp file to anybody who might be interested in suggesting how I can handle colors. Its about 90kb compressed. Currently, I just split the color into rgb components between 0 and 1 because that's traditionally what metapost uses --- 3 components between 0 and 1. The color wheel looks like a wheel, but some of the other plots come out badly. Cheers, Geoff Russell