how to generate a random matrix with specific condition ?

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Firas Al-Kharabsheh
回答： Jan 2016-4-9
i want to generate a random matrix in every time i want a specific row will be the same
if i have Matrix
A = [0 -1 0 0 0
1 1 -1 1 1
0 1 0 0 0
0 1 0 0 0 ]
i want to generate a random matrix and in every time the row and column which does have the ones in there entry i want to still appear in every time
  • generate a completely random matrix, and then overwrite that row and column
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John D'Errico
John D'Errico 2016-4-9
So just generate a completely random matrix, and then overwrite that row and column. WTP?

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回答（1 个）

Jan
Jan 2016-4-9
A = [0 -1 0 0 0; ...
1 1 -1 1 1; ...
0 1 0 0 0; ...
0 1 0 0 0 ];
X = rand(size(A)); % Or randi?
index = (A(:) ~= 0);
X(index) = A(index);

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