Language Reference

PGRAF Call

produces scatter plots

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

The inputs to the PGRAF subroutine are as follows:

is an matrix of points.

id

is an character matrix of labels for each point. The PGRAF subroutine uses up to 8 characters per point. If id is a scalar (), 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 axis (centered beneath the axis).

ylabel

is a character scalar or quoted literal that labels the axis (printed vertically to the left of the 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 following statements 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