PGRAF Call

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Language Reference

PGRAF Call

produces scatter plots

CALL PGRAF( xy<, id><, xlabel><, ylabel><, title>);

The inputs to the PGRAF subroutine are as follows:

xy: is an n ×2 matrix of (x,y) points.
id: is an n ×1 character matrix of labels for each point. The PGRAF subroutine uses up to 8 characters per point. If id is a scalar (1 ×1), then the same label is used for all of the points. The label is centered over the actual point location. If you do not specify id, x is the default character for labeling the points.
xlabel: is a character scalar or quoted literal that labels the x axis (centered below the x axis).
ylabel: is a character scalar or quoted literal that labels the y axis (printed vertically to the left of the y axis).
title: is a character scalar or quoted literal printed above the graph.

The PGRAF subroutine produces a scatter plot suitable for display on a line printer or similar device.

The statements below specify a plotting symbol, axis labels, and a title to produce the plot shown:

   xy={1 2, 3 3, 5 4, 6 2};
   call pgraf(xy,'*','X','Y','Plot of X vs Y');

                               Plot of X vs Y
    |
  4 +                             *
    |
    |
    |
Y   |
  3 +               *
    |
    |
    |
    |
  2 + *                                  *
    --+------+------+------+------+------+-
     1.0    2.0    3.0    4.0    5.0    6.0    

                        X

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