Présentation de 1920.jps

/syracuse/bbgraf/tmp/1920.jpg
25 setxunit 7.5 setborder -6 6 setxrange -6 6 setyrange /a 5 def /b 3 def 2 2 settkstep 1 1 setsubtkstep 2 2 setmkstep ticks traceaxes axesarrow unites 0.75 setlinewidth continu bleu /X {settvar #rpn# a * Cos (t) } def /Y {settvar #rpn# b * Sin (t) } def 0 2 pi mul {X} {Y} Courbeparam