Switch two row of matrix
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How to switch two row of matrix? For example: matrix A is: 1 3 4; 2 4 5 and Y want to be 2 4 5; 1 3 4 ?
3 个评论
Nikhil Sachan
2019-2-1
temp=A(2,:);
A(1,:)=A(2,:);
A(2,:)=temp;
%this will swap required rows
madhan ravi
2019-2-21
编辑：madhan ravi
2019-2-21
A more efficient answer had been accepted 5 years ago.
Tristan McRae
2019-2-22
omg savage
采纳的回答
Azzi Abdelmalek
2013-10-5
编辑：Azzi Abdelmalek
2013-10-5
A=[1 3 4; 2 4 5]
A([1 2],:)=A([2 1],:)
3 个评论
Evil Meet
2020-10-27
Thank you very much. U r awesome
Kevin Moss
2021-6-12
can anyone explain the logic behind why/how this works?
Andrey Piavkin
2021-6-27
this works pretty clear
we take first and second all the row and make it equal to second and first all the row
for example, if you wanted to switch the third and the first row, you should type like this:
A([1 3], :) = A([3 1], :)
where ':' at second place stands for taking all the columns and '[1 3]' stands for first and third row
更多回答（1 个）
Pontus Vikstål
2019-8-12
编辑：Pontus Vikstål
2019-8-12
This way might be even faster.
A = [1 3 4; 2 4 5]
x = [0 1;1 0];
A = x*A
Then there's also this way
A = [1 3 4; 2 4 5]
A = flip(A)
2 个评论
madhan ravi
2020-7-25
If A has more than two rows this won’t work.
Luis Mendez Lopez
2020-9-22
Yeah i will do that with my 600*600 matrix
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