How to assign values to a matrix from index array?

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Juan Moreno
Juan Moreno on 14 Nov 2020
Commented: Juan Moreno on 14 Nov 2020
I have an initial zeros matrix A, to fill with ones at matrix coordinates given by elements in x and y. but when i do A(x,y)=1, it does not work.
I have this:
when I do A(x,y)=1, I got this:
but I expect this:
How should I do this assignment?

Accepted Answer

James Tursa
James Tursa on 14 Nov 2020
A(sub2ind(size(A),x,y)) = 1;

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