Présentation de 1231.jps

/syracuse/bbgraf/tmp/1231.jpg
25 setxunit 7.5 setborder 90 setangle_repere -5 5 setxrange -5 5 setyrange 1 1 settkstep .5 .5 setsubtkstep 2 2 setmkstep ticks subticks marks traceaxes axesarrow .75 setlinewidth continu bleu /X {settvar #rpn# t } def /Y {settvar #rpn# 4/(1+2*Exp(-t)) } def 0 20 {X} {Y} Courbeparam