copying the contents of a vector onto a longer vector

Let's say I have a vector a that is of size 4. I have a vector b of size 10. I want to copy the contents of vector a into b until it 'runs out'.

For example: if a = [1 2 3 4]; and b is a size 10 vector.

Then b = [1 2 3 4 1 2 3 4 1 2].

How do i do this?

Answer 1

[Chunru]

a = [1 2 3 4]; 
b = a(mod(0:9, 4)+1) 

b = 1×10

1 2 3 4 1 2 3 4 1 2