Ordering of the columns of an array according to a given line

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Marcus Vinicius Pereira de Souza
Dear all, I have the following database:
15 50 15 30 20
1 3 5 2 4
However, I need to sort as follows:
15 30 50 20 15
1 2 3 4 5
Can anyone help me? Thanks a lot. Marcus Vinicius

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回答（2 个）

Andrei Bobrov
Andrei Bobrov 2012-9-24
编辑：Andrei Bobrov 2012-9-24
A = [15 50 15 30 20
1 3 5 2 4]; The initial array
[ii ii] = sort(A(2,:));
out = A(:,ii);
or
out = sortrows(A',2)';
Rodrigo
Rodrigo 2012-9-24
It seems like you want to sort by the value of the second row. To do this you first find the order you want:
[~,ind]=sort(A(2,:));
where A is the array containing your data. Then you produce the sorted array by calling the index:
B=A(:,ind);

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