MATLAB: Scale Matrix Dimensions by Factor

Question

I have a matrix that needs to be scaled in the horizontal, copying each row.

Ex:

[1 2 3]

[4 5 6]

Scale Columns only by Factor 3

[1 1 1 2 2 2 3 3 3]

[4 4 4 5 5 5 6 6 6]

How can I write a simple loop to perform this. Thanks!

Answer 1

>> repelem([1 2 3],3)
ans =
     1     1     1     2     2     2     3     3     3
>>