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sort a 2x4 matrix

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Matthew Tyler Jeffries
编辑： Adam Danz 2019-5-9
I have 2x4 matrix and would like to sort the first row from smallest number to largest number, but I would also like the second row to follow along.
V=[9 3 5 2; 30 49 22 354]
Iwant=[2 3 5 9; 354 49 22 30]

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采纳的回答

Adam Danz
Adam Danz 2019-5-9
[~, sortIdx] = sort(V(1,:));
Iwant = V(:,sortIdx);
  2 个评论
Matthew Tyler Jeffries
Matthew Tyler Jeffries 2019-5-9
Thank you! Just what I needed.
Adam Danz
Adam Danz 2019-5-9
编辑：Adam Danz 2019-5-9
Glad I could help!
Star Strider also had a good idea to use sortrows(). I did a speed test between these two solutions and found that the one I proposed is ~2.7 times faster on average (100,000 repetitions of each; p<0.0001 wilcox rank sum test).

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更多回答（1 个）

Davide Figoli
Davide Figoli 2019-5-9
you could try doing:
V=[9 3 5 2; 30 49 22 354];
V_orderd=[];
V_ordered(1,:)=sort (V(1,:));
V_ordered(2,:)=sort(V(2,:),'descend');

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