MATLAB: How to create a mat file in a loop and store a matrix generated in that newly created mat file? (i also need to save every created mat file in the loop)

Question

I tried with the following code but it says

for j=0:0
    for k=0:1
        filename=sprintf('%d%d.wav',j,k);
        sin_of_sin=audioread(filename);
        [st_matrix] = st_temp(sin_of_sin);  % st_temp is my function file which returns the generated matrix
        sprintf('angry_%d%d.mat',j,k)=st_matrix;
     end
end

Error message:

Subscript indices must either be real positive integers or logicals.

Answer 1

Instead of assigning a matrix to the sprintf() function, which of course you cannot do,

sprintf('angry_%d%d.mat',j,k)=st_matrix;  % Bad syntax!!!

try this:

matFileName = fullfile(pwd, sprintf('angry_%d%d.mat',j,k));
save(matFilename, 'st_matrix');