Name:         PGRNGE

Purpose:      choose axis limits

Category:     GRAPHICS

File:         pgplot.src

Author:       T.J. Pearson

Use:          see description below.

Description:

            SUBROUTINE PGRNGE (X1, X2, XLO, XHI)
            REAL X1, X2, XLO, XHI
      
       Choose plotting limits XLO and XHI which encompass the data
       range X1 to X2.
      
       Arguments:
        X1, X2 (input)  : the data range (X1<X2), ie, the min and max values
                          to be plotted.
        XLO, XHI (output) : suitable values to use as the extremes of a graph
                          axis (XLO <= X1, XHI >= X2).

Updates:      Oct 16, 1998: JPT automatically extracted from source.