28.45 setxunit %7.5 setborder 90 setangle_repere -0.5 20 setxrange -1 6 setyrange 1 setxtkstep 0.5 setxsubtkstep /xmarkstyle {[1.5 dup] dctext} def traceOx axeOxarrow xticks xsubticks xmarks 0 xmark /t {2} def /a {2} def /b {a 2 add} def noir b .75 2.5 6.5 9.5 12.5 15.5 diag_en_boite (Classe 1) 17 b [t dup] crtext bleu a .75 2 4.5 7.75 12.5 15.5 diag_en_boite (Classe 2) 17 a [t dup] crtext