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13 Graphics

The commands for graphing data begin with the g prefix key. Calc uses GNUPLOT 2.0 or later to do graphics. These commands will only work if GNUPLOT is available on your system. (While GNUPLOT sounds like a relative of GNU Emacs, it is actually completely unrelated. However, it is free software. It can be obtained from ‘’.)

If you have GNUPLOT installed on your system but Calc is unable to find it, you may need to set the calc-gnuplot-name variable in your Calc init file or .emacs. You may also need to set some Lisp variables to show Calc how to run GNUPLOT on your system; these are described under g D and g O below. If you are using the X window system or MS-Windows, Calc will configure GNUPLOT for you automatically. If you have GNUPLOT 3.0 or later and you are using a Unix or GNU system without X, Calc will configure GNUPLOT to display graphs using simple character graphics that will work on any POSIX-compatible terminal.