Help for ASCHIST

PURPOSE:
ASCHIST will create a tabular histogram file from byte or halfword data.

EXECUTION:

	ASCHIST in table user-parameters
OPERATION:
ASCHIST collects a histogram of the input file and outputs it as a
tab-delimitted ASCII file of two columns.  The first column is the DN
value, and the second is the population of that level.  Column headings
are optional.  If the input file's VICAR label contains the PICSCALE 
keyword (i.e., the image has been PICSUM'd), input image will be divided 
by the PICSCALE value (the number of images summed) prior to the generation
of the histogram. 

RESTRICTIONS:
The input image must not exceed 60000 samples per line.

ORIGINAL PROGRAMMER: Charlie Avis, 8/15/94
CURRENT COGNIZANT PROGRAMMER: charlie avis
REVISION HISTORY:

      15 Aug 94 ...cca... initial release
      23 Jan 95 ...cca... make DN column optional
      10 Mar 97 ...sp.... Made portable for UNIX.  
                          Increased max number of samples to 60000.