How to get 2nd minimun value from matrix?

Question

0 个投票

I want to get the 2nd minimum number from a matrix. Elements in matrix are random and i don't want to sort them. for example

A=[2 6 83 14 29;17 42 31 90 23;17 52 43 81 29;48 11 90 21 58];

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Answer 1

Jeremy 2015-1-29

1 个投票

It is a little cumbersome but for any array x, this should work:

min(x(x~=min(x(:))))

Answer 2

Guillaume 2015-1-29

0 个投票

I don't want to sort them.

Asking for the nth element is by definition sorting them.

One possible way (which obviously does a sort):

 A = [2 6 83 14 29;17 42 31 90 23;17 52 43 81 29;48 11 90 21 58];
 u = unique(A);
 a2 = u(2) %achtung baby!

its not giving correct result.

Guillaume 2015-1-29

Huh! And what is the 'correct result' you expect?