[Scilab-users] Circular contour plot

[Jens Simon Strom]

Hallo Scilab afficionados,
I would like to cut off all lines of a 2D contour plot which are outside 
of a circle. I tried to set all external x and y  to %nan. This works 
however partially spoils the plot /inside/ the circle too. Polar 
organisation of the x-y-points doesn't help either because x and y have 
to be monotone. Could anyone give me a hint how to proceed here?
Kind Regards
Jens
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