How to get the max value index and the next max value index and next until the end (the smallest) of the array

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Ibrahim Fares 2019-1-6

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https://ww2.mathworks.cn/matlabcentral/answers/438497-how-to-get-the-max-value-index-and-the-next-max-value-index-and-next-until-the-end-the-smallest-of

编辑： Ibrahim Fares 2019-1-11

采纳的回答： Ibrahim Fares

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For example if A Vector

A=[5.2,6.3,1.2,10,2,4.3];

I want to get the index of the max value (in my example is 10 so the index is 4) then find the next max value which is 6.3 then the index is 2,,, the final output i need it to be as follows:

I=[3,2,6,1,5,4]

where I the returned indices corresponding to A

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Answer 1

Ibrahim Fares 2019-1-11

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编辑：Ibrahim Fares 2019-1-11

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I solved this problem, so I will share it with you:

function [ mapped] = mapping( x ) 
    for i = 1:length(x)
        [~,j]=max(x);
        mapped(j)=i;
        x(j)=-inf;
    end
end

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Answer 2

madhan ravi 2019-1-6

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[~,I]=sort(A)

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Ibrahim Fares 2019-1-6

Thanks for your interest, but A randomly changes in an iteration, is always do this step?

and why this happens?

madhan ravi 2019-1-6

编辑：madhan ravi 2019-1-6

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"[D,I] = sort(A) also returns a sort index I which specifies how the

elements of A were rearranged to obtain the sorted output D:"

>> [D,I]=sort(A)
D =
    1.2000    2.0000    4.3000    5.2000    6.3000   10.0000
I =
     3     5     6     1     2     4   % indices of orginal values 
>> 