How to arrange indices of matrix A by descending order ?

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Pradya Panyainkaew 2017-12-26

评论： Star Strider 2017-12-26

if I have

A=[25,41,38] when I sort this matrix by descending order , I will get A=[41,38,21]

I want to arrange indices of matrix A by descending order and shows a result (B) like this

B=[2,3,1]

How to create program to get this result ?

Thanks in advance.

Star Strider 2017-12-26

To get ‘B’, ask for the second output from sort:

A=[25,41,38];
[A_sorted,B] = sort(A, 'descend')
A_sorted =
    41    38    25
B =
     2     3     1

Thank you very much.

Star Strider 2017-12-26

As always, my pleasure.

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