MATLAB: How to combine 2d matrices mat files into a single 3d matrices file

3d matrices

I have a number of 240 x 320 double mat files. I wanted to combine around 30 of them to make it a single 3d mat file resulting to 240x320x30 double.
I have tried below codes, but something went wrong because all the values inside the files turns out to be zero and thats disrupt my output. Can someone helps me with this? Thank you in advance!
d=(240,320,30);
for k=1:30
d(:,:,k);
end

Best Answer

Something like this should get you started. This will load the data from all of the .mat files in the specified directory, concatenate their data, and then save the concatenated array as a new .mat file:
D = 'path to where the files are';
S = dir(fullfile(D,'*.mat'));
N = numel(S);
C = cell(1,N);
for k = 1:N
    T  = load(fullfile(D,S(k).name));
    C{k} = T.fieldname; % pick the fieldname to suit. 
end
A = cat(3,C{:});
save('array.mat','A')
See also:
https://www.mathworks.com/help/matlab/import_export/process-a-sequence-of-files.html
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