Polar plot

Syntax: | `GRAPH\POLAR r theta GRAPH\RADAR r theta`
Qualifiers: | `\AXESONLY, \OVERLAY`
Defaults: | axes drawn
Examples: | `GRAPH\POLAR R THETA GRAPH\POLAR\OVERLAY R2 T2 GRAPH\RADAR\AXESONLY R T`

If either the `\POLAR` qualifier or the `\RADAR` qualifier is used, the input variables, `r` and `theta`, are assumed to represent polar coordinates, where `r` contains the radial components and `theta` contains the angular components, in degrees.

A polar plot is always autoscaled. The radial axis at 0° always has a minimum value of zero. The maximum value of the radial axis is determined by the data. All 360° are always displayed. By default, four radial axes are drawn, but any number of axes can be drawn using the `POLARNAXES` characteristic. Only the radial axis at 0° can have numeric labels and the optional text label. Circular grid lines can be drawn, and are controlled by the `POLARGRID` characteristic.

The location of the origin of the polar plot is controlled by the `POLARORIGINX` and `POLARORIGINY` characteristics, and the length of the radial axis is controlled by the `POLARAXISLENGTH` characteristic.

Use the `\POLAR` qualifier if you would like 0° to be horizontal through the origin. Use the `\RADAR` qualifier if you would like 0° to be vertical.

The user has control over the polar plot by means of the Polar Characteristics.

GRAPH command
Plotting symbols