| 
            plsdiplt
          ( | xmin , | 
| ymin , | |
| xmax , | |
| ymax ); | 
      Set relative minima and maxima that define the current
      plot-space window.  If plsdiplt is not called the default values
      of 
        ,
      xmin
      
        ,
      ymin
      
        , and
      xmax
      
        
      are 0., 0., 1., and 1.
    ymax
      
      Redacted form: plsdiplt(xmin, ymin, xmax, ymax)
    
This function is used in example 31.