Null Device (no graphical output)

The ``null'' device can be used to suppress all graphic output from a program.
Device type code
Default device name
None (the device name, if specified, is ignored).
Default view surface dimensions
Undefined (the device pretends to be a hardcopy device with 1000 pixels/inch and a view surface 8in high by 10.5in wide.)
Color capability
Color indices 0--255 are accepted.
Input capability
Environment variables
PGPLOT_DEBUG : if this environment variable is defined, with any value, some statistics are reported on standard output.
T. J. Pearson, 1988--1994.