how to duplicate each cell in an array

Hi, i have an array of numbers. I want a that a different array will have each cell in the first array but multiple times. for example: array1 = [1,2,5] so array2 = [1,1,1,2,2,2,5,5,5] if i choose to multiply by 3. I have a function that can do it

factor = 3

for i=1:length(array1)

     array2(1+factor*(i-1):factor*i) = array1(i);
end

however i was wondering if there is a function that does it which will be less time costly since I have to repeat this process multiple times with large arrays.

thanks!

Answer 1

[KL]

Something like this maybe,

n = 3;
array1 = [1,2,5];
array2 = reshape(array1.*ones(n),1,[])

     1     1     1     2     2     2     5     5     5

or

array2 = ones(n).*array1
array2 = array2(:).'

or

 array2 = reshape(repmat(array1,n,1),1,[])

[TZ]

Great thanks!