Help for QPLOT

Purpose:  QPLOT calls QPLOT2 to plot the DN values along a specified straight 
  line through an image. It also does spectral plots for multi-channel data. 
  The plot will be displayed on the terminal unless PLOTOUT = YES, in
  which case QPLOT2 generates a PostScipt (EPS) output file which will be printed
  on the device specified by DEVTYPE.

Parameters:  There are two types of parameters: 

      (1) Parameters with a single specification:
                INP             OUT             NCHAN
		TITLE		LOTITLE		XTITLE
		YTITLE		LABELSIZ	LOLABEL
		NORM		RDS		DISPLACE
		XLENGTH		YLENGTH         TICS
		XSCALE		YSCALE
      (2) Parameters which have a specification for each line plotted:
		PROCESS		SPROCESS
		XVALUES         YVALUES

Restrictions:
  (1) Maximum number of lines plotted is 10.
  (2) Maximum x axis length is 6 feet. (on PRINTRONIX)
  (3) Maximum y axis length is 12 inches. (on PRINTRONIX)
  (4) Spectral plots require a single input in mss format.


Vicar Plotting

The Vicar Plotting system can produce plots on either a display device or
in a postscript file which can be sent to a printer.  This is controlled
by the parameter PLOTOUT. If PLOTOUT is "NONE", the plot is displayed
interactively by gnuplot. If PLOTOUT is "YES", the plot is written as a
Postscript file and printed. If PLOTOUT is something other than "NONE" or
"YES", the value is used as a filename for the output, which will be
either Postscript or a gnuplot script, depending on the value of PLOTFMT.

Original Programmer:  John H. Reimer
Cognizant Programmer:  John H. Reimer
Revision: One - 15 April 1984
                14 November 1988
Made portable: 7-Nov 1995 Florance Moss
 01jul14 -wlb- qplot2 Replaced NODISP with PLOTOUT to work with the new
        qplot2 interface, which changed as part of an update switching
        from XRTPS to Gnuplot.
 23aug06 -lwk- since default for Unix is now different from VMS, disabled
	latter option (VMS no longer being supported);  replaced NOPRINT 
	with NODISP (apparently the behaviour of the XRTPS software has 
	changed!)