how to solve the problem of "out of memory"?

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muhammad ismat 2018-4-5

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https://ww2.mathworks.cn/matlabcentral/answers/392808-how-to-solve-the-problem-of-out-of-memory

 i have the following code to calculate matrix s  
 for i = 1:n 
    for j = 1:i  % <-- Note the 1:i instead of 1:n
  s(i,j) = (DL(i,IDX(j))*DL(j,IDX(i))) / norm(DL(i,IDX(j))) * norm(DL(j,IDX(i)));
  s(j,i) = s(i,j);
    end
end

where the input for this code is matrix (5000 x 5000) i.e i= 1:5000 and also j, and each time calculate s(i,j) from mentioned equation that depend on DL (vector 5000 x 2), but when i run this code the program give me error " out of memory"