Matlab expanding matrix quickly

Hey all,

Suppose you have as input: matrix A = [10 9 8] and some factor X = 3

As output i would like to obtain: R = [10 10 10 9 9 9 8 8 8]

I am wondering if there are better (faster) solutions then my solution below:

R = zeros(1,length(A)*X);

for i =1:X
    R(1+length(A)*(i-1):1:length(A)*i) = A(i);
end

Answer 1

[Fangjun Jiang]

reshape(repmat(A,X,1),1,[])