From help-request at octave dot org Mon Oct  3 10:34:09 2005
Subject: Re: repmat (was "Computing distance matrix robustly")
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: Tom Holroyd <holroydt at mail dot nih dot gov>
Cc: Mike Miller <mbmiller at taxa dot epi dot umn dot edu>, help@octave.org
Date: Mon, 3 Oct 2005 11:33:56 -0400

On  3-Oct-2005, Tom Holroyd wrote:

| 
| > Is there an advantage to using repmat instead of kron as follows:
| > kron(ones(m, n), X)
| > vs.
| > repmat(X, m, n)
| 
| In 2.9.3 kron is built-in so it's a huge winner.

But repmat calls kron (at least in some cases) so the speed difference
should not be too large.  I think repmat is a better mnemonic than
kron, so using repmat makes the code easier to follow.

jwe



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