How to get matrix element A{1,2} at indices 1,2 from matrix A =@(x,y)

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Ole
Ole 2021-3-3
评论： Ole 2021-3-3
How to get element with index 1,2 from matrix defined as function.
A =@(x,y) [x 1*x 2*x 3*x; y 5 6 7; 1 1 1 1; 2 3 4 5]
A(3,1) % evaluates the matrix for x=3 y =1
% How to get element at indices 1,2 A(3,1){1,2}=3 meaning 1*x = 3

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