Used to globally turn color output on/off
plscolor(color)
Used to globally turn color output on/off for those drivers/devices that support it.
Redacted form: plscolor(color)
This function is used in example 31.
color (PLINT, input)
Color flag (Boolean). If zero, color is turned off. If non-zero, color is turned on.
Many developers (who are credited at http://plplot.sourceforge.net/credits.php) have contributed to PLplot over its long history.
PLplot documentation at http://plplot.sourceforge.net/documentation.php.