gnuplot looks to have just the functionality I need. It's going to be awkward to use from PERL, but not impossible. You feed it a bunch of parameters and data in the stdin and it can spit out a gif file to stdout. It's not pretty, though, so I'm still open to suggestions about an all-PERL solution.
Thanks
Bret
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I would second Aristotle's suggestion of using PDL, It has a submodule, TriD, I think it is called, that will do 3D scatterplots. This is an all perl solution.
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Yes, PDL::Graphics::TriD is a powerful all-PERL solution. A cursory look through the documentation did not reveal any obvious way to use it inside a CGI script, but I'm still studying the problem. If I can find a way to get it to put out GIF or another format that PERL knows how to show in a browser, I'll be set.
Thanks,
Bret
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