[Numpy-discussion] PCA - Principal Component Analysis

Bill Baxter wbaxter@gmail....
Mon Jun 25 02:24:12 CDT 2007


Except last I checked numpy.linalg doesn't have an efficient method for
retrieving only a few PCA components.
So yeh, you can do PCA but it will be *really* slow on most of the types of
problems that PCA is usually used for.
You need something like an ARPACK wrapper, which I think they have in the
scipy.sandbox.

--bb

On 6/25/07, Matthieu Brucher <matthieu.brucher@gmail.com> wrote:
>
> Hi,
>
> You have everything you need for PCA in numpy.linalg.
>
> Matthieu
>
> 2007/6/21, Alex Torquato S. Carneiro <archsheep@yahoo.com.br >:
> >
> > I'm doing some projects in Python (system GNU / Linux - Ubuntu 7.0)
> > about image processing. I'm needing a implementation of PCA, prefer to
> > library for apt-get.
> >
> > Thanks.
> > Alex.
> >
> >
> > ------------------------------
> > Novo Yahoo! Cadê? <http://yahoo.com.br/oqueeuganhocomisso+> -
> > Experimente uma nova busca.
> >
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