I believe PGPlot is used in a Matlab-like Macintosh application called RLab. I think source could be obtained, and it may be trivial to get PGPLot working independently (but what do I know?). RLab is available from Info-Mac mirrors, for example: http://hyperarchive.lcs.mit.edu/HyperArchive/Archive/sci/rlab-118c.hqx Regards, Mike West mwest@nyx.net Standard disclaimers. Good Quote.