Value swapping

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developer
developer 2011-9-8
Hello,
I have a matrix
x =
7 8
7 13
1 7
3 7
i want to search all 7 and shift to the first column and the corresponding value to the other coloumn, like
x =
7 8
7 13
7 1
7 3

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采纳的回答

Grzegorz Knor
Grzegorz Knor 2011-9-8
x(x(:,2)==7,:) = fliplr(x(x(:,2)==7,:))
  2 个评论
developer
developer 2011-9-8
Thanks :)
Grzegorz Knor
Grzegorz Knor 2011-9-8
similar solution:
x(x(:,2)==7,end:-1:1) = x(x(:,2)==7,:)

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更多回答（1 个）

Paulo Silva
Paulo Silva 2011-9-8
x = [ 7 8
7 13
1 7
3 7]
f2=find(x(:,2)==7)+size(x,1);
f1=find(x(:,1)~=7);
tmp1=x(f1);
x(f1)=x(f2);
x(f2)=tmp1;
x
Grzegorz Knor solution seems to be better, I didn't test it.

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