combined sorting

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Anand Anand
Anand Anand 2011-4-3
For ex;I have an array A=[1:4] and B=[12:19:2:20].If I sort B in descending order B=[20 19 12 2].I want the corresponding positions in A to be swapped as well...ie A=[4 2 1 3].How do I achieve that?

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Matt Tearle
Matt Tearle 2011-4-3
[sortB,idx] = sort(B,'descend');
sortA = A(idx);
Or put the vectors into a matrix and use sortrows.
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Anand Anand
Anand Anand 2011-4-3
thanks a lot Matt..I was actually writing a very long algorithm.-:)
Matt Tearle
Matt Tearle 2011-4-7
In MATLAB, that's generally a sign you're doing it wrong! :)

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