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Re: repmat (was "Computing distance matrix robustly")

From: David Bateman
Subject: Re: repmat (was "Computing distance matrix robustly")
Date: Mon, 03 Oct 2005 17:33:11 +0200
User-agent: Mozilla Thunderbird 0.8 (X11/20040923)

Tom Holroyd wrote:

Is there an advantage to using repmat instead of kron as follows:
kron(ones(m, n), X)
repmat(X, m, n)

In 2.9.3 kron is built-in so it's a huge winner.

Expect that kron is used by repmat for the 2-D cases... repmat also special cases when numel(X) is 1, and handles N-D cases... Its a better habit to use repmat as its generic and just as fast..


David Bateman                                address@hidden
Motorola Labs - Paris +33 1 69 35 48 04 (Ph) Parc Les Algorithmes, Commune de St Aubin +33 1 69 35 77 01 (Fax) 91193 Gif-Sur-Yvette FRANCE

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