Contour legend

Legend

By default, the contours are labeled with the actual contour level, using three significant digits. If `\-AXES` is used, then no legend is allowed.

If the `\LEGEND` qualifier is used, then the contours are labeled with an integer index and the list of indices corresponding to the actual contour levels, the legend, is plotted along the right side of the axes. If areas and/or volumes are requested, using `\AREAS` and/or `\VOLUMES`, these values will also appear in the legend.

If you zoom in on a contour plot, by setting the axis scales beforehand, and you use the `\PARTIAL` qualifier as well as the `\AREAS` qualifier, then the areas will be percentages of the area currently showing on the graph. By default, the areas are percentages of the total area.

To add more contours to a contour plot, re-issue the same contour command with the `\CONTINUE` qualifier and the legend will be continued from where it left off. You must have used the `\-RESET` qualifier on the previous `CONTOUR` command if you intend to use `\CONTINUE` on a succeeding `CONTOUR` command.

Legend size

The size of the legend characters is controlled with the `LEGENDSIZE` characteristic. The default value of `%LEGENDSIZE = 3`.

Axis relocation

The legend requires the right end of the x-axis to be set to `75%` of the window, that is, `%XUPPERAXIS` is set to `75`.

By default, `%XUPPERAXIS` is reset to its former value after the `CONTOUR` command is finished. If the `\-RESET` qualifier is used, the axis location will not be reset.

Saving contour levels and coordinates
Polar coordinates