The following commands illustrate one way to plot a vector field, where the angle of the plotting symbols conveys information.
GENERATE A 0,,360 20 ! create vector A: min= 0, max= 360, length= 20 GENERATE R 5,,5 20 ! create vector R: min= 5, max= 5, length= 20 SET PCHAR -18 1 1 A ! symbol `centered arrow', size 1, colour 1, angle A GRAPH\POLAR R A ! draw graph in polar coordinates GRAPH\-AXES\POLAR R/2 A ! overlay curve in polar coordinates SET PCHAR -18 1 1 90-A ! symbol `centered arrow', size 1, colour 1, angle 90-A GRAPH\-AXES\POLAR 3*R/4 A ! overlay curve