MATLAB: How to do the data extraction data from a 3D matrix

Question

Hi all,

I have a 3D matrix with a dimension of (251*28*10) that I want to extract a specific data from it. As the extracted data are not in the same dimension, the empty values should be NaNs the used loop is

 for i = 1:10
   for j = 1:28
      density(:,:,i) = find(density_1000(:,j,i)>= 27.5 & density_1000(:,j,i)<=28);
      den = density_1000 (density);   % this should be the finle matrix of the extracted data (251*28*10)
   end
 end

Any help will be appreciated.

Thanks

Answer 1

mask = density_1000 >= 27.5 & density_1000 <= 28;
den = density_1000;
den(~mask) = nan;