How do I take a matrix of x,y values and insert in a value 1 in a square matrix? For instance in a Mat = 4 x 4 matrix of zeros and the matrix XY = (1,2) (3,4). How do I enter a 1 into (1,2) and (3,4)?

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MP
MP 2018-6-14
评论： MP 2018-6-14
How do I take a matrix of x,y values and insert in a value 1 in a square matrix? For instance in a Mat = 4 x 4 matrix of zeros and the matrix XY = (1,2) (3,4). How do I enter a 1 into the positions (1,2) and (3,4)?

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KSSV
KSSV 2018-6-14
编辑：KSSV 2018-6-14
A = zeros(4) ;
A(1,2) = 1 ;
A(3,4) = 1 ;
Read about matlab matrix indexing.
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