25 setxunit
7.5 setborder
90 setangle_repere
-10 10 setxrange
-10 10 setyrange
1 1 settkstep
.5 .5 setsubtkstep
1 1 setmkstep
ticks
subticks
marks
traceaxes
axesarrow
/R {settvar
#rpn# cos(3*t)
} def
0 80 pi mul settrange
gsave
.75 setlinewidth
continu
bleu
(R) courbepolar
grestore
|