matlab - the fastest way to replicate a vector in two direction -

i have vector want replicate elements in both row , column directions. have found using ones built-in function faster m-file functions repmat , kron. have seen examples replicating vector in 1 direction, not find how in both direction.

consider following example:

a = [1 2 3]; 

i want create these matrices:

b = [1 1 1       1 1 1      2 2 2      2 2 2      3 3 3      3 3 3];  

and

c = [1 2 3 1 2 3      1 2 3 1 2 3]; 

how can ones? there faster way?

in code, vectors replicated bigger , have many vectors in for loop. looking faster way.

how if had matrix replicated? example:

d = [1 2 3      4 5 6]; 

and want have:

e = [1 2 3 1 2 3      4 5 6 4 5 6      1 2 3 1 2 3      4 5 6 4 5 6]; 

c , e straightforward cases repmat. b different, common suggestion use kron(a', ones(2,3)) here alternatives: a similar function r's rep in matlab

according many answers in link, fastest possibly

reshape(repmat(a, 6, 1), 3, 6)'