Here is a simple double array:
array=[3 1 1]
Largest element index is 1
or:
array=[3 9 1]
Largest element index is 2
How can I get the largest element index?
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4 Answers
Use the second output argument of the max function:
[ max_value, max_index ] = max( [ 3 9 1 ] )
Comments
My standard solution is to do
index = find(array == max(array), 1);
which returns the index of the first element that is equal to the maximum value. You can fiddle with the options of find if you want the last element instead, etc.
Comments
If you need to get the max value of each row you can use:
array = [1, 2, 3; 6, 2, 1; 4, 1, 5];
[max_value max_index] = max(array, [], 2)
%3, 3
%6, 1
%5, 3
Comments
In Octave If A = 1 3 2 6 5 4 7 9 8 1) For Each Column Max value and corresponding index of them can be found by >> [max_values,indices] =max(A,[],1) max_values = 7 9 8 indices = 3 3 3 2) For Each Row Max value and corresponding index of them can be found by >> [max_values,indices] =max(A,[],2) max_values = 3 6 9 indices = 2 1 2 Similarly For minimum value >> [min_values,indices] =min(A,[],1) min_values = 1 3 2 indices = 1 1 1 >> [min_values,indices] =min(A,[],2) min_values = 1 4 7 indices = 1 3 1
