pformat:

Synopsis: Sets the format.

Syntax: pformat ( "format-string", "axis", I )

Description:

	Sends a format-string to the I:th GNUPLOT-window.
	"axis" can be "x", "y", "z", "xy", or nothing (which is the
	same as "xy"), setting the format to, for example, "%g" or 
	"%.2f" or "%3.0fm".
	
	If 'I' is not specified the default plot-window (0) is used.

