in reply to Alternative for GD::Graph?
Try gnuplot, or perhaps Chart::Graph::Gnuplot - i'm not sure if the later supports all the options you'll need.
Learning to use gnuplot for the first time is like learning perl -- you can accomplish alot very quickly, but a lot of what you do will work for reasons you don't understand, and you can use it for years without realizing there are easier/cleaner/better ways of doing the same thing.
It should be able to do exactly what you want - you can plot damn near anything, in all sorts of styles.
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