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how to swap this matrix

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Anusha
Anusha 2013-10-17
编辑： Andrei Bobrov 2013-10-17
i have this column of matrix
Z= 2
4
1
7
9
how to swap this 1 and 2

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采纳的回答

Andrei Bobrov
Andrei Bobrov 2013-10-17
编辑：Andrei Bobrov 2013-10-17
Z([1,2]) = Z([2,1]);
ADD
Z = [2
4
2
1
7
9
1
1]; % new case
a = [1, 2]; % replacement value
[l,ii] = ismember(Z,a);
Z(l) = a(3-ii(l));

更多回答（1 个）

dpb
dpb 2013-10-17
Z(1:3)=flipud(Z(1:3));
Only works because of odd number, of course. In general to swap individual elements will still take the temporary to hold the one element while overwrite the other.

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