50 setxunit
7.5 setborder
90 setangle_repere
-2.1 2.1 setxrange
-1.1 1.1 setyrange
1 1 settkstep
.5 .5 setsubtkstep
2 2 setmkstep
ticks
subticks
marks
traceaxes
axesarrow
0.75 setlinewidth
continu
bleu
/X {settvar
#rpn#   2*Cos(2*t)
} def
/Y {settvar
#rpn#   Sin(3*t)
} def
  0  200 pi mul {X} {Y} Courbeparam