Graph legend
If LEGENDON
is set true, i.e.,
non-zero, a legend entry is drawn into a legend frame box. A legend entry consists of a short line
segment, with or without plotting symbol(s), and a string. The legend entry is drawn when the
GRAPH
command is entered. The string portion of the legend entry is expected as the
first parameter of the GRAPH
command. For example:
GRAPH 'legend entry' X Y
If LEGENDON
is false, i.e., zero, a string entered as a first
parameter with the GRAPH
command will be ignored.