Replicate matrix elements without for loop

I am trying to take the matrix

base =[1 2; 3 4]

and replicate the elements to give

expn = [ 1 1 2 2; 1 1 2 2; 3 3 4 4; 3 3 4 4]

without using for loops. I would like to use repmat but not sure how to do that elementwise.

[Howard Wilton]

Got it!

N = 2; base = [1 2; 3 4]

expn = kron(base,ones(N))

Answer 1

[David Hill]

base =[1 2; 3 4];
repelem(base,2,2)

ans = 4×4

1 1 2 2 1 1 2 2 3 3 4 4 3 3 4 4