%% auteur : N. CAILLE
0.5 5 setxrange
-4 4 setyrange

400 setwidth 
250 setheight

/A11 {1 0} def
/A21 {2 1} def
/A22 {2 -1} def
/A31 {3 2} def
/A32 {3 0} def
/A33 {3 -2} def

/w1 {4.4 2} def
/w2 {4.4 0} def
/w3 {4.4 -2} def

%%quadrillage
1 setlinewidth
A11 A31 (->) line
A11 A33 (->) line
A21 A31 (->) line
A21 A32 (->) line
A22 A32 (->) line
A22 A33 (->) line

<tex>
$$
p
$$
</tex>
A11 [1.7 1.7] cltexlabel

<tex>
$$
19.304773
$$
</tex>
A31 [1.7 1.7] crtexlabel

<tex>
$$
0.528957
$$
</tex>
A32 [1.7 1.7] crtexlabel

<tex>
$$
0
$$
</tex>
A33 [1.7 1.7] crtexlabel

16 setfontsize
setSymbol
  (w) w1 cctext
  (1) indice
  (w) w2 cctext
  (2) indice
  (w) w3 cctext
  (3) indice