plot: openpl et al. \- graphics interface
.B arc(x, y, x0, y0, x1, y1)
graphic output in a relatively
device-independent manner.
must be used before any of the others to open the
are null-terminated, and do not contain newlines.
Various flavors of these functions exist for different
They are obtained by the following
graphics stream on standard
plot(5), plot(1), graph(1)