MATLAB: How to repeat an array

array sequence

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.

Best Answer

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
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