SUPSGRAPH - PostScript GRAPH plot of a segy data set         

 supsgraph <stdin [optional parameters] | ...                    

 Optional parameters:                                      
 style=seismic          seismic is default here, =normal is alternate  
                  (see psgraph selfdoc for style definitions)    

 nplot is the number of traces (ntr is an acceptable alias for nplot)  

 d1=tr.d1 or tr.dt/10^6 sampling interval in the fast dimension  
   =.004 for seismic          (if not set)                       
   =1.0 for nonseismic        (if not set)                       

 d2=tr.d2               sampling interval in the slow dimension  
   =1.0                 (if not set)                       

 f1=tr.f1 or tr.delrt/10^3 or 0.0  first sample in the fast dimension  

 f2=tr.f2 or tr.tracr or tr.tracl  first sample in the slow dimension  
   =1.0 for seismic               (if not set)             
   =d2 for nonseismic             (if not set)             

 verbose=0              =1 to print some useful information      

 tmpdir=         if non-empty, use the value as a directory path
                  prefix for storing temporary files; else if the
                  the CWP_TMPDIR environment variable is set use 
                  its value for the path; else use tmpfile()     

 Note that for seismic time domain data, the "fast dimension" is 
 time and the "slow dimension" is usually trace number or range. 
 Also note that "foreign" data tapes may have something unexpected     
 in the d2,f2 fields, use segyclean to clear these if you can afford   
 the processing time or use d2= f2= to over-ride the header values if  
 not.                                                

 See the psgraph selfdoc for the remaining parameters.                 

 On NeXT:     supsgraph < infile [optional parameters]  | open         

 Credits:

      CWP: Dave Hale and Zhiming Li (pswigp, etc.)
         Jack Cohen and John Stockwell (supswigp, etc.)

 Notes:
      When the number of traces isn't known, we need to count
      the traces for pswigp.  You can make this value "known"
      either by getparring nplot or by having the ntr field set
      in the trace header.  A getparred value takes precedence
      over the value in the trace header.

      When we must compute ntr, we don't allocate a 2-d array,
      but just content ourselves with copying trace by trace from
      the data "file" to the pipe into the plotting program.
      Although we could use tr.data, we allocate a trace buffer
      for code clarity.

In /luton/home/mikew/su/su32.9/src/su/graphics/psplot:
 SUPSGRAPH - PostScript GRAPH plot of a segy data set            

 supsgraph <stdin [optional parameters] | ...                    

 Optional parameters:                                      
 style=seismic          seismic is default here, =normal is alternate  
                  (see psgraph selfdoc for style definitions)    

 nplot is the number of traces (ntr is an acceptable alias for nplot)  

 d1=tr.d1 or tr.dt/10^6 sampling interval in the fast dimension  
   =.004 for seismic          (if not set)                       
   =1.0 for nonseismic        (if not set)                       

 d2=tr.d2               sampling interval in the slow dimension  
   =1.0                 (if not set)                       

 f1=tr.f1 or tr.delrt/10^3 or 0.0  first sample in the fast dimension  

 f2=tr.f2 or tr.tracr or tr.tracl  first sample in the slow dimension  
   =1.0 for seismic               (if not set)             
   =d2 for nonseismic            (if not set)             

 verbose=0              =1 to print some useful information      

 tmpdir=         if non-empty, use the value as a directory path
                  prefix for storing temporary files; else if the
                  the CWP_TMPDIR environment variable is set use 
                  its value for the path; else use tmpfile()     

 Note that for seismic time domain data, the "fast dimension" is 
 time and the "slow dimension" is usually trace number or range. 
 Also note that "foreign" data tapes may have something unexpected     
 in the d2,f2 fields, use segyclean to clear these if you can afford   
 the processing time or use d2= f2= to over-ride the header values if  
 not.                                                

 See the psgraph selfdoc for the remaining parameters.                 

 On NeXT:     supsgraph < infile [optional parameters]  | open         

 Credits:

      CWP: Dave Hale and Zhiming Li (pswigp, etc.)
         Jack Cohen and John Stockwell (supswigp, etc.)

 Notes:
      When the number of traces isn't known, we need to count
      the traces for pswigp.  You can make this value "known"
      either by getparring nplot or by having the ntr field set
      in the trace header.  A getparred value takes precedence
      over the value in the trace header.

      When we must compute ntr, we don't allocate a 2-d array,
      but just content ourselves with copying trace by trace from
      the data "file" to the pipe into the plotting program.
      Although we could use tr.data, we allocate a trace buffer
      for code clarity.