MATLAB: Matrix manipulation from one to another one

matrix manipulation

How to generate
A= [ 1  0  3  0   0; ...
     0  7  0  0  10; ...
     0  0  0  14 15]
from
 B = [1 2 3 4 5; ...
      6 7 8 9 10; ...
      11 12 13 14 15]
[EDITED, Jan, Code formatted]

Best Answer

Here is the B = [multiple rows * multiple columns] example.
B = reshape(1:64,8,8); % Create 8x8 sample matrix
idx = rand(size(B)) > 0.5; % Randomly select whether keep it or change to zero
A = B;
A(idx) = 0;
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