How to repeat an array?

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arina octave
arina octave 2015-1-30
编辑： Youssef Khmou 2015-1-30
Hi, I have an array a = [1 2 3] and I want to repeat it twice so I'll have b = [1 2 3 1 2 3]. I try this code, and of course it won't work as I want.
a = 1:3;
for n = 1:2
b = a;
end
b
I don't know what I should write in the for-loop. Could anyone help me? Thank you.

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Youssef Khmou
Youssef Khmou 2015-1-30
编辑：Youssef Khmou 2015-1-30
Many solutions exist for this problem, the first one is the repmat solution:
a=[1 2 3];
b=repmat(a,1,3);
The second solution consists of using for loop as follows :
b=[];
for n=1:3
b=[b a];
end
  2 个评论
arina octave
arina octave 2015-1-30
hi Youssef, thank you so much for answering my question again!
Youssef Khmou
Youssef Khmou 2015-1-30
编辑：Youssef Khmou 2015-1-30
You are welcome Arina.

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