Question

I have a vector, e.g.

vector = [1 2 3]

I would like to duplicate it within itself n times, i.e. if n = 3, it would end up as:

vector = [1 2 3 1 2 3 1 2 3]

How can I achieve this for any value of n? I know I could do the following:

newvector = vector;
for i = 1 : n-1
    newvector = [newvector vector];
end

This seems a little cumbersome though. Any more efficient methods?

Answer 1

Try

repmat([1 2 3],1,3)

I’ll leave you to check the documentation for repmat.