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How to flip only some rows inside a matrix?

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Martha
Martha 2014-8-24
评论： Martha 2018-2-28
Hi, I have a matrix xx which is a 6x20 matrix, and I want to flip only the even rows. Im trying this but is doesn't work:
f=size(xx);
f=f(1);
f=0:1:f;
f=f';
for s=f+2
xx(f,:)=fliplr(xx(f,:));
end
I will appreciate any advice. Martha

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采纳的回答

Azzi Abdelmalek
Azzi Abdelmalek 2014-8-24
编辑：Azzi Abdelmalek 2014-8-24
A(2:2:end,:)=fliplr(A(2:2:end,:))

更多回答（2 个）

the cyclist
the cyclist 2014-8-24
编辑：the cyclist 2014-8-24
No need for a loop. Just do this:
xx(2:2:end,:) = fliplr(xx(2:2:end,:));
VAISHNAVI GATTU
VAISHNAVI GATTU 2018-2-28
hello, how to rotate certain elements in different rows in a matrix? for example a=[1 2 3 8; 4 5 6 4; 7 8 9 3] suppose i want all elements in second and third column to be rotated row wise. output should be a=[1 5 6 8; 4 8 9 4; 7 2 3 3]

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