How to find index of first 3 maximum number in matrix
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I have the following function that n is the first 3 maximum value of matrix m:
m = [7;1;4;4;12;2;6;10;2];
temp = sort( m, 'descend' );
n = temp(1:3)
I need to know the index of matrix n, like:
p = [5;8;1]; % first max value in matrix m is 12 that it located in the fifth row
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Orion
il 5 Nov 2014
Modificato: Orion
il 5 Nov 2014
use the second output argument of sort
m = [7;1;4;4;12;2;6;10;2];
[temp,originalpos] = sort( m, 'descend' );
n = temp(1:3)
p=originalpos(1:3)
1 Commento
Amit Kumar
il 21 Feb 2018
Modificato: Amit Kumar
il 21 Feb 2018
Great.. I just want to add a comment that if you have NaN in your matrix replace beforehand as m(isnan(m))=0 and then use, as:
m = [7;1;4;4;NaN;2;6;10;2];
m(isnan(m))=0
[temp,originalpos] = sort( m, 'descend' );
n = temp(1:3)
p=originalpos(1:3)
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