MATLAB: Execute a script in a loop

executefftloopsstft

I have made a script that calculates FFT, STFT, Wigner-Ville, etc. The inputs are file1.csv, file2.csv,file3.csv, etc. The script executes the inputs and gives me outputs, the outputs are crossponding to the input i.e output1, output2, output3, etc.
I want to create a loop that import the input files (file1.csv, file2.csv, etc) and executes them consecutively and save the output in a matrix, each column in the matrix represents an output i.e. column1 is output1 and colum2 is output 2 etc.

Best Answer

"The script executes the inputs and gives me outputs, the outputs are crossponding to the input i.e output1, output2, output3, etc."
Magically defining/accessing variable names is one way that beginners force themselves into writing slow, complex, buggy code that is hard to debug. Read this to know why:
https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval
Basically your bad data design willl force you into writing pointlessly slow, complex, and buggy code, but you can easily avoid this by designing your data better: do NOT have lots of separate numbered variables!
You can simply collect all of the data into one array (e.g. a cell array) inside the loop, for example:
N = 20;
C = cell(1,N);
for k = 1:N
    output = ... your code
    C{K} = output;
end
M = [C{:}];
plot(M)
You can easily loop over those files too, e.g.:
S = dir('*.csv');
S = natsortfiles(S); % download from FEX.
for k = 1:numel(S)
    S(k).data = csvread(S(k).name); % use filename
end
M = [S.data]
https://www.mathworks.com/help/matlab/matlab_prog/access-multiple-elements-of-a-nonscalar-struct-array.html
This will be much simpler, more effiicent, and easier to debug than any code you could write with magically accessed variable names!
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