Level 2 Help for STATPLT

The input dataset must be in the classification statistics dataset format.
This is the format output by STATS and USTATS. Alternatively, stats may be
gathered in an IBIS interface file and converted to a statistics dataset via
the program SDSIBIS.

The plot produced by STATPLT is two dimensional. Therefore, only two bands
are plotted. The first value of BANDS is used for the x-axis, and the second
value is used for the y-axis. The default is BANDS=(1,2).

Assuming Normal distributions (STATS, USTATS, and FASTCLAS all make this
assumption), confidence boundaries in two dimensions take the shape of
ellipses. The SIGMA variable allows the user to choose a level of
confidence, in terms of standard deviations from the mean. The default is
SIGMA=1, a one standard deviation region about the mean.

The values given by XSCALE define the end-points of the axis. 
The default is XSCALE=(0,255).

The values given by YSCALE define the end-points of the axis. 
The default is YSCALE=(0,255).

The keyword NODISP is used to suppress the automatic display of the output
plot image. When NODISP is specified, the automatic display of the plot
image is suppressed, but is automatically saved in the output PostScript
file. The output PostScript file may be printed using the command 'qpr'.

STATPLT provides the user with the capability of specifying the name of the
output PostScript file.  If a name is not specified, STATPLT identifies the
output file as 'statplt.psf'.