[pstricks] arctan

Jacques L'helgoualc'h lhh+no_spam at free.fr
Sun Dec 2 22:54:39 CET 2007

Doris Wagner a écrit, dimanche 2 décembre 2007, à 19:49 :
> hi list,


> in my pstricks-book in the section about pst-plot, there are functions 
> acos and asin, but no atan.
> How can I get arcus tangens?


 y x atan

returns the argument (in degrees, [0-360[) of (x,y) ; you can use
something like

 t neg -1 atan 180 sub

 --- or use pst-math « t ATAN » (result in radians).
Jacques L'helgoualc'h

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