MATLAB: How to make a contour plot of a matrix consisting of 1 and NaN from a 3D array

3d arraycontourfnan

Hello,

I have a 3D image. I would like using contourf function to visualize this image, but there is NaN. This NaN are useful because I have also true 0 in my 3D array.

figure,contourf(squeeze(mean(imgd3,1)));

When I used it, an error message displayed:

Warning: Contour not rendered for non-finite ZData 
> In contourf (line 60)

I read that contourf can not manage with NaN value. But, I can transform them in 0. Do you have any idea to plot this image ?

Thanks

Best Answer

contourf(squeeze(mean(imgd3,'omitnan')))

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Do you want something like this

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Or maybe this makes more sense

X = zeros(3,10);
X(2, :) = 1;
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You can set the AlphaData and AlphaDataMapping associated with the surface plot created by slice()

http://www.mathworks.com/help/techdoc/ref/surface_props.html

In particular you could set it to

double(~isnan(TheImage))

which would be 0 exactly where there are nan.

Best Answer

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