calc: Graphics
14 Graphics
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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 ‘http://www.gnuplot.info’.)
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.
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