MATLAB Answers


How to find second largest value in an array?

Asked by Minu
on 7 Jun 2013
Latest activity Commented on by Image Analyst
on 28 Dec 2015


I want to find the second largest and minimum value in array? A=[1;10;15;30;40;50;100].I want to get the result as Second minimum value=10 and second largest value=50 Help me plz...

  1 Comment

What do you want to do if there are multiple instances of the maximum or minimum?



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3 Answers

Answer by Andrei Bobrov
on 7 Jun 2013
Edited by Andrei Bobrov
on 7 Jun 2013
 Accepted answer

[ii,ii] = sort(A);
out = A(ii([2,end-1]));

for your example (A) just:

out = A([2,end-1]);

more variant

A1 = unique(A);
out = A1([2,end-1]);


Jan Simon
on 7 Jun 2013

Ficed typo: Of course -Inf is needed instead of +Inf to mask an existing maximium.

@Walter: Exactly. While the original message "A=[1;10;15;30;40;50;100]" looks like the OP talks about a double vector with finite values, the another type of input or values must be considered.

Even if another value is -Inf, my method replies the correct result. But NaN is the better choice.

How to get the index with the second minimum or maximum value in an array?

Define second minimum. In the array [1,1,2,3] what is the second minimum? Is it 1 or is it 2?

Answer by Fernando
on 17 Nov 2014

function [ y ] = second_min( x )

 y = min(x(x>min(x)));



function [ y ] = second_max( x )

 y = max(x(x<max(x)));



Answer by Walter Roberson
on 7 Jun 2013

for K = A
  if sum(A > K) == 1

  1 Comment

I got your point.

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