How to repeat an array?

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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.

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

Youssef Khmou 2015-1-30

编辑：Youssef Khmou 2015-1-30

You are welcome Arina.

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