25 setxunit
7.5 setborder
90 setangle_repere
-5 5 setxrange
-5 5 setyrange
1 1 settkstep
.5 .5 setsubtkstep
2 2 setmkstep
ticks
subticks
marks
traceaxes
axesarrow
/R {settvar
#rpn# sqrt(2*cos(2*t))
} def
0 10 pi mul settrange
gsave
1.75 setlinewidth
continu
bleu
(R) courbepolar
grestore
|