plvasp.3plplot man page
plvasp — Specify viewport using aspect ratio only
Sets the viewport so that the ratio of the length of the y axis to that of the x axis is equal to aspect.
Redacted form: plvasp(aspect)
This function is used in example 13.
- aspect (PLFLT, input)
Ratio of length of y axis to length of x axis.
Many developers (who are credited at http://plplot.sourceforge.net/credits.php) have contributed to PLplot over its long history.
PLplot documentation at http://plplot.sourceforge.net/documentation.php.