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From Sean Owen <sro...@gmail.com>
Subject Re: [Taste] Sanity Check and Questions
Date Mon, 22 Jun 2009 01:27:08 GMT
I see so it's more like picking some most-orthogonal subset of the
vectors actually. I get it in principle I think. I also imagine the
simple "anti-clustering" approach you mention works pretty well.

On Sun, Jun 21, 2009 at 9:23 PM, Ted Dunning<ted.dunning@gmail.com> wrote:
> Gram-Schmidt doesn't have to change vectors.  You can view it as a way of
> selecting from an infinite number of vectors in order to get an orthornormal
> basis.  The task of getting an interestingly diverse set of recommendations
> is a bit different in that we only have a finite number of items to
> recommend and in that orthonormality isn't really a concept.  Another way to
> look at it as greedy set-cover.

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