25 setxunit 7.5 setborder 90 setangle_repere -4 5 setxrange -1 5 setyrange /quadrillagegray 0.4 def 1 setquadrillagexstep 1 setquadrillageystep quadrillage 1 1 settkstep .5 .5 setsubtkstep 2 2 setmkstep ticks marks traceaxes axesarrow unites /A{-2 1} def /B{4 4} def /H{4 1} def [A B H] dashpoints A B line (A) A urtext (B) B urtext (H) H urtext