R2014b: How to make the filled areas in contourf semi-transparent?

(At least) in Release 2014b, the contourf - command returns a Contour object, which may be filled or not, but there is no such thing as a "FaceAlpha"-property. The question is, how to make these filled areas nonetheless appear semi-transparent ???

Example:

[cc,hc]=contourf(peaks,[0.02,0.02]);

(I have already tried to work with the returned contour matrix cc and fill-commands, but it is hard to do this if - as here is the case - the borders of the axes are touched.)

[Boris Belousov]

See how to make contour plots transparent

Answer 1

[Garrett Barter]

I struggled with this too. If you use "pcolor" instead of "contourf" this is possible. For instance,

h = pcolor(X,Y,Z); set(h,'EdgeAlpha',0,'FaceAlpha',0.7);