trivial issue - matrix in for loop: failed to fill a matrix

Hello everyone,

I am growing more confident in Matlab, thanks to community support, but sometimes I feel stucked due to very silly issues, as per the following case:

matr_counts_per_chunk = zeros(120,2752);
for col= 1:length(tr_x_ch)
    matr_mat_fil_non_bool_sigle_tr = resh_matr_mat_fil_non_bool(:,col);
    matr_counts_per_chunk(:,col) = sum(reshape(matr_mat_fil_non_bool_sigle_tr,[],250),2);
end

the problem is: matr_counts_per_chunk is only correctly filled in the first iteration, then I get only zeros in every 2751 left columns. This mean the for loop is actiually doing nothing/not working except for the first call.

Any help will be appreciated

[dpb]

It doesn't mean the loop "isn't working" at all; only that the results aren't what you were expecting. The problem is likely the data are zero elsewhere.

It isn't possible to diagnose anything without sample data and it's certainly not clear what the real underlying intent of the code is, but it looks most peculiar.

Reduce the problem size to one that is manageable to see what is going on (an 8-10 x 10-20 array is just as useful to test code logic as is something huge and yet is small enough that one can inspect the input and output to find out where the logic issue(s) is(are).