Contour plot - how to show contours of irregular body in XY plane?

Hi all

I use contour(X,Y,Z,n) function and it works fine. However, sometimes I would like to show only one part of the contours which are in top view (X-Y plane) within body of irregular shape. Something similar like "inpolygon".

Is anybody having an idea how to show only contours within selected area?

Thanks, Janez

Answer 1

[Sean de Wolski]

You could replace the values that you don't want with NaNs. For example:

[x,y,z] = peaks;
subplot(121)
contourf(x,y,z)
z(abs(z)<0.5) = nan;
subplot(122)
contourf(x,y,z)

[Janez]

Thank you, it works. I love simple solutions ...