repmat (was "Computing distance matrix robustly")

[Mike Miller]

On Sun, 2 Oct 2005, Søren Hauberg wrote:

> D = sqrt( repmat(sX2, 1, n) + repmat(sX2', m, 1) - 2*XX );


Is there an advantage to using repmat instead of kron as follows:

kron(ones(m, n), X)

vs.

repmat(X, m, n)

They are pretty similar in speed from what I'm seeing.  I've been using 
kron for this sort of thing and wonder if I should be using repmat.  The 
newest version of kron is a fast .oct file but some older versions were 
much slower.

Mike