gnuplot is a 24-year old program that is maintained via patches (the original copyright and license requires that - http://gnuplot.cvs.s...right?view=markup ).

A newer package that uses similar script syntax as gnuplot but is much more friendly to extension is pyxplot (and it includes pie charts) - http://pyxplot.org.u...bution/index.html [Thanks for giving me the incentive to look into this - pyxplot looks like a very nice package, though it uses LATeX and would have a learning curve for me.]

gnuplot fits with the way I work, but has a learning curve.

I see there's a CPAN module for doing gnuplot charts with perl, and a pie chart module for that - http://kobesearch.cp.../Gnuplot/Pie.html That seems like a nice package, but I haven't used it myself, and I can't find an example.

Another package that might fit your needs better than gnuplot is matplotlib for python. It does pie charts out of the box.

http://matplotlib.so...les/pie_demo.html

Since it does more out of the box, it's a bigger package with more dependencies, but prebuilt binaries are available. http://matplotlib.so...s/installing.html

Whether it's a good fit for you, I can't say. But it does plotting very very well.

HTH a little.

Cheers,
Scott.