Présentation de 777.jps

25 setxunit
7.5 setborder
90 setangle_repere
-5 5 setxrange
-5 5 setyrange
1 1 settkstep
.1 .1 setsubtkstep
1 1 setmkstep
ticks
subticks
marks
traceaxes
axesarrow
/R {settvar
#rpn#   cos(3*t)/cos(2*t)
} def
 pi neg pi  settrange
gsave
   .75 setlinewidth
   continu
   bleu
   (R) courbepolar
grestore