SUCHART - prepare data for x vs. y plot             

 suchart <stdin >stdout key1=sx key2=gx              

 Required parameters:                                
      none                                     

 Optional parameters:                                
      key1=sx     abscissa                     
      key2=gx           ordinate                     
      outpar=null name of parameter file             

 The output is the (x, y) pairs of binary floats           

 Examples:                                     
 suchart <segy_data outpar=pfile >plot_data                
 psgraph <plot_data par=pfile title="CMG" \\               
      linewidth=0 marksize=2 mark=8 | ...            
 rm plot_data                                        

 suchart <segy_data | psgraph n=1024 d1=.004 \\      
      linewidth=0 marksize=2 mark=8 | ...            



 Credits:
      SEP: Einar Kjartansson
      CWP: Jack K. Cohen

 Notes:
      The vtof routine from valpkge converts values to floats.