| 
            plscmap1_range
          ( | min_color , | 
| max_color ); | 
Set the cmap1 argument range for continuous color plots that
    corresponds to the range of data values.  The maximum range
    corresponding to the entire cmap1 palette is 0.0-1.0, and the smaller
    the cmap1 argument range that is specified with this routine, the
    smaller the subset of the cmap1 color palette that is used to
    represent the continuous data being plotted.  If
    min_color is greater than
    max_color or max_color
    is greater than 1.0 or min_color is less than
    0.0 then no change is made to the cmap1 argument range.  (Use
    plgcmap1_range to get the cmap1 argument range.)
      Redacted form: plscmap1_range(min_color, max_color)
    
This function is currently used in example 33.