thanks for the fantastic write up, and I don't mind if you do many more posts on charting. I have been working with similar problems. One question, on windows I kept running into a problem where two processes ran gnuplot. There seems to be some shared memory issues and both plots become corrupt. have you run into this? I haven't looked at gnuplot for a year so it might be a fixed issue.
Shared memory between processes! My goodness. I've certainly not run into that problem, but then I've only been using gnuplot from a single process.
Maybe there are intermediate files being generated without being partitioned by some kind of job id?
I saw your long posting regarding Gnuplot, and thought you might be interested to know that there is now a book on it: "Gnuplot in Action". You can pre-order it directly from the publisher: Manning: Gnuplot in Action.
The book includes chapters on multi-dimensional plotting and off-line scripting, including a section on using Gnuplot with Python.
If you want to learn more about the book and the author, check out my book page at Principal Value - Gnuplot in Action.
Let me know if you are interested in a review copy.
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