Amazingly, my last memory of using a programming language to plot graphs is with VisualBasic, circa 2001. Since then, I played with Matlab or R once or twice, but in all of my experiences with real programming languages (Perl, Lisp, Java), I do not recall plotting anything.
As a result, the only tool I know how to use is Matlab, which is annoyingly proprietary (and even that is rusty).
As a result, the only tool I know how to use is Matlab, which is annoyingly proprietary (and even that is rusty).