MATLAB: Open .mat files and concatenate their matrix contents

matrixstructures

Hi,

I will like to open many .mat files (sequentially named file_0.mat, file_1.mat,…..file_50.mat), and then concatenate (vertically and sequentially) the matrix data (about 2 million rows by 50 columns) into one variable available in the workspace accessible to other programs.

How can I write matlab codes to carry out this processes?

Thanks

James

Best Answer

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

Related Solutions

MATLAB: Vertical concatenation of matrices in a loop

Yuvashree, try

 data = [];
 for fileNr = 1:8   
    [...]                  % removed code for better readability
    data1 = load(FileName);
    if (rem(fileNr,8)==0)  % save every 8th matrix
       data = [data; data1.dataStruct.data];
    end
 end

MATLAB: How can i make this code snippet a function

for k = 1:numel(full_val)
    plot(full_val(k).val(1,:))
    hold on
end

You could also use a loop when load-ing the .mat files.

Note that (assuming compatible sizes) you could plot all of the data at once, without a loop:

tmp = cat(3,full_val.val);
plot(squeeze(tmp(1,:,:))

Best Answer

Related Solutions

MATLAB: Vertical concatenation of matrices in a loop

MATLAB: How can i make this code snippet a function

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