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How to get 2nd minimun value from matrix?

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Zahid Iqbal Rana
Zahid Iqbal Rana on 29 Jan 2015
Commented: Guillaume on 29 Jan 2015
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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Answers (2)

Jeremy
Jeremy on 29 Jan 2015
It is a little cumbersome but for any array x, this should work:
min(x(x~=min(x(:))))

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Guillaume
Guillaume on 29 Jan 2015
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!

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Guillaume
Guillaume on 29 Jan 2015
Huh! And what is the 'correct result' you expect?

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