On Tue, 11 Mar 2003, Marc Schwartz wrote: > I may be mis-understanding what you are trying to do, but if you are > using plot() to generate a scatter plot (as opposed to a density > plot) and there are actual overlapping points between the two sets, > you could use jitter() to introduce some random noise into the > plotted points.
jitter is a good idea, but in this case, the problem is the density of the ploted points themselves. Just adding noise do much in this case. [So that it's more clear what the problem is, I've stuck a graph up at http://rzlab.ucr.edu/images/test.png. Ideally you should be able to decern where the red region stops underneath the green [while at the same time seeing that the green has outliers below it.] There is a mode in photoshop called multiply that does something similar, but I'm not sure if there is a postscript mode that does the same thing. [Editing the postscript file itself is not a problem if that's the only solution...] Don Armstrong -- My spelling ability, or rather the lack thereof, is one of the wonders of the modern world. http://www.donarmstrong.com http://www.anylevel.com http://rzlab.ucr.edu
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