The `pstricks` driver is intended for use with the "pstricks.sty" macro package for LaTeX. It is an alternative to the `eepic` and `latex` drivers. You need "pstricks.sty", and, of course, a printer that understands PostScript, or a converter such as Ghostscript.
PSTricks is available via anonymous ftp from the /pub directory at Princeton.edu. This driver definitely does not come close to using the full capability of the PSTricks package.
Syntax:
set terminal pstricks {hacktext | nohacktext} {unit | nounit}
The first option invokes an ugly hack that gives nicer numbers; the second has to do with plot scaling. The defaults are `hacktext` and `nounit`."