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Find indicies of k smallest matrix elements

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Brady Dean
Brady Dean am 29 Sep. 2020
Kommentiert: madhan ravi am 29 Sep. 2020
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.

Akzeptierte Antwort

Xingwang Yong
Xingwang Yong am 29 Sep. 2020
[~, indices] = sort(A(:), 'ascend');
ind = indices(1:k);
  1 Kommentar
Brady Dean
Brady Dean am 29 Sep. 2020
Ah, I forgot about the A(:) trick. This works perfectly.

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Weitere Antworten (1)

Sindar
Sindar am 29 Sep. 2020
[~,idx] = mink(A,2);
  3 Kommentare
Brady Dean
Brady Dean am 29 Sep. 2020
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
madhan ravi am 29 Sep. 2020
Unfortunately not everyone has the Crystal Ball.

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