Obtaining sparse matrix indices

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Kalpanie Mendis
Kalpanie Mendis 2020-8-31
评论： Kalpanie Mendis 2020-8-31
Hi,
I am using sparse function to obtain non-zero elements of a matrix. for example,
s= sparse(M)
(1,1) -5.0000
(2,1) 1.0000
(8,1) 5.0000
(1,2) 5.0000
(2,2) -6.0000
Now I want to creat3 3 arrays containing the row indices, column indices and value indices of the output. For intance,
A_i= [1,2,8,1,2] : row vector, i of Matrix(i,j).
A_j= [1,1,1,2,2]: row vector, j of Matrix(i,j).
A_s= [-5,1,5,5,-6]: row vector, value of the element: A(A_i(m),A_j(m))=A_s(m).
How can I create the matrix A from the output of the sparse function?

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Steven Lord
Steven Lord 2020-8-31
Use find.

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