The third figure, a circle with a slash through it, assigned the character code C, consists of three polygons: a circle and two empty arcs. An observation with missing values separates the observations defining each of the three polygons. The outer circle is defined by the first group of observations. The empty arcs are drawn with three continuous arcs using the PTYPE variable pattern V-C-V-C-V-C-V. The straight line that closes the arc is drawn automatically by the GFONT procedure in order to complete the polygon. Because all the polygons are part of one character, the continuous space they define is filled.
C W 0 64 0 P /* circle with slash */ C V 32 64 1 P C C 32 32 1 P C V 64 32 1 P C C 32 32 1 P C V 32 0 1 P C C 32 32 1 P C V 0 32 1 P C C 32 32 1 P C V 32 64 1 P C V . . 1 P C V 12.4 18.1 1 P C C 32 32 1 P C V 8 32 1 P C C 32 32 1 P C V 32 56 1 P C C 32 32 1 P C V 45.9 51.6 1 P C V . . 1 P C V 51.6 45.9 1 P C C 32 32 1 P C V 56 32 1 P C C 32 32 1 P C V 32 8 1 P C C 32 32 1 P C V 18.1 12.4 1 P ;