How can I add new data to specific row and colum of a matrix?

ain - 2024-05-20T23:05:38+00:00

Question: How can I add new data to specific row and colum of a matrix?

Eg: A = [1 2 5; 3 4 6; 7 8 9]; i want to make it A = [1 0 2 5; 3 0 4 6; 0 0 0 0; 7 0 8 9];

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Expert Answer

Kshitij Singh answered . 2025-11-20

A = [1 2 5; 3 4 6; 7 8 9]
B = zeros(size(A) + 1)
B([1 1 0 1]>0,[1 0 1 1]>0) = A

OR

A = reshape(1:9,3,[])';
B = zeros(size(A)+1);
m = 3;
n = 2;

ii = ones(size(B));
ii(m,n) = 0;

B((+all(ii,2))*(+all(ii)) > 0) = A;

or just

B(all(ii,2),all(ii)) = A;

 

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