| 
	    plgdiplt
	  ( | p_xmin, | 
| p_ymin, | |
| p_xmax, | |
| p_ymax ); | 
      Get relative minima and maxima that define current
      plot-space window.
      If plsdiplt has not been called the default values pointed to by
      p_xminp_yminp_xmaxp_ymax
p_xmin
	  (PLFLT_NC_SCALARReturned value of the relative minimum in x.
p_ymin
	  (PLFLT_NC_SCALARReturned value of the relative minimum in y.
p_xmax
	  (PLFLT_NC_SCALARReturned value of the relative maximum in x.
p_ymax
	  (PLFLT_NC_SCALARReturned value of the relative maximum in y.
      Redacted form: plgdiplt(p_xmin, p_ymin, p_xmax, p_ymax)
    
This function is used in example 31.