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GNU Emacs Calc 2.02 Manual

A.9 The GNUPLOT Program

Calc's graphing commands use the GNUPLOT program. If you have GNUPLOT but you must type some command other than `gnuplot' to get it, you should add a command to set the Lisp variable calc-gnuplot-name to the appropriate file name. You may also need to change the variables calc-gnuplot-plot-command and calc-gnuplot-print-command in order to get correct displays and hardcopies, respectively, of your plots.