Source
30 setxunit
30 setyunit
-1 10 setxrange
-1 5 setyrange
[1 1 .5 .5 .1 .1] {orange} Quadrillage
ticks
subticks
marks
traceaxes
axesarrow
unites
/f {setxvar
#rpn# sqrt(x)
} def
boxit
#tex# $f (x) = \sqrt x$
2 4 [1.3 dup] cctexlabel
setTimes
(O) O drtext
setTimesItalic
(X) xmax 0 dltext
(Y) 0 ymax dltext

bleu
.75 setlinewidth
0 10  {f} Courbe