How to concatenate multiple .mat files and generate a 3D matrix?

I have 100 files which are 30482x43 (number of data x layers), and what I am trying to do is make a single 30482x100x43 matrix.

I would appreciate your help please!!

[Walter Roberson]

Please see http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

Answer 1

[Stephen23]

"I have 100 files ..."

which are probably named using some sequential numbering, so you will need to take that into account in the code:

P = 'absolute or relative path to where the files are saved';
S = dir(fullfile(P,'*.mat'));
S = natsortfiles(S); % download: https://www.mathworks.com/matlabcentral/fileexchange/47434-natural-order-filename-sort
for k = 1:numel(S)
    F = fullfile(P,S(k).name);
    L = load(F);
    S(k).data = L.nameOfTheVariableWhichYouDidNotTellUs;
end
A = permute(cat(3,S.data),[1,3,2]);

[Andres Ulloa]

thank you so much you helped me a lot!!

Answer 2

[KSSV]

matFiles = dir('*.mat') ; 
N = length(matFiles) ; 
iwant = zeros(3048,43,N) ;
for i = 1:N
    S = matfile(matFiles(i).name) ;
    iwant(:,:,i) = S.myvar ;    % myvar is the variable in your mat file 
end