25 setxunit
7.5 setborder
90 setangle_repere
-10 10 setxrange
-4 8 setyrange
1 1 settkstep
.5 .5 setsubtkstep
2 2 setmkstep
ticks
subticks
marks
traceaxes
axesarrow
unites
/f {setxvar
#rpn#   2*Sin (x) * Cos (3*x), x^2
} def
/g {setxvar
#rpn#   1/x
} def
gsave
   bleu
   .75 setlinewidth
   continu
   {f} courbe
grestore
gsave
   rouge
   .75 setlinewidth
   mixte
 xmin .01 neg  {g} Courbe
 .01 xmax  {g} Courbe
grestore