Repeating a row vector in MATLAB until it reaches a specified length.

Suppose I have 2 single row vectors j and k, such that the length of j > the length of k

The problem: I want to make the length of k= the length of j in such a way that the elements in k keep repeating themselves until the length of k = the length of j.

Example:

j=[1,2, 3, 4, 5, 6, 7]; k=[-1,3,4];

After the program runs, it should return:

k=[-1,3,4,-1,3,4,-1];

How can this be accomplished in MATLAB? The more ways there are to implement this program (loops, if statements, logical indexing, etc.) the merrier.

Regards,

Answer 1

[Honglei Chen]

Here is one way to do it

k_new = k(mod(0:length(j)-1,length(k))+1)

HTH

Answer 2

[James Tursa]

result = k(mod(0:numel(j)-1,numel(k))+1);