Présentation de 7390.jps

25 setxunit
7.5 setborder
90 setangle_repere
-15 15 setxrange
-15 15 setyrange
1 1 settkstep
.5 .5 setsubtkstep
2 2 setmkstep
ticks
subticks
marks
traceaxes
axesarrow
.75 setlinewidth
continu
bleu
/X {settvar
#rpn#   (t^2-4)Cos ((t+1/t)*pi)
} def
/Y {settvar
#rpn#   (t^2-4)Sin ((t+1/t)*pi)
} def
 20 neg 20  {X} {Y} Courbeparam