Find indicies of k smallest matrix elements

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Brady Dean 2020-9-29

评论： madhan ravi 2020-9-29

I'm trying to find the indicies of smallest k matrix elements.

For example if I have

A = [10 5 2; 34 5 21; 4 6 8];

and I want to find the smallest 2 elements indicies then I want indicies 7 and 3.

Xingwang Yong 2020-9-29

[~, indices] = sort(A(:), 'ascend');
ind = indices(1:k);

Brady Dean 2020-9-29

Ah, I forgot about the A(:) trick. This works perfectly.

Sindar 2020-9-29

[~,idx] = mink(A,2);

Brady Dean 2020-9-29

I'm using R2020b, that's the newest isn't it?

mink gives minimums over a dimension, not the whole matrix. Sindar's code doesn't work for my example above.

madhan ravi 2020-9-29

Unfortunately not everyone has the Crystal Ball.

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