How to find out the value of a matrix corresponding row and column?

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Boni_Pl
Boni_Pl 2019-8-30
评论： Boni_Pl 2019-8-30
Hello I have index of a matrix x=[1;2;3] & y=[1;1;2]. Now how to check what value in which index of the matrix.Suppose the matrix is z=[0 4;5 6;1 0]. Now how can I check what is the value of (x,y) index.Please help.

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Stephen23
Stephen23 2019-8-30
Use sub2ind:
>> x = [1;2;3];
>> y = [1;1;2];
>> z = [0,4;5,6;1,0];
>> z(sub2ind(size(z),x,y))
ans =
0
5
0

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