Lucke, Joseph F
Joseph.F.Lucke at uth.tmc.edu
Thu Nov 6 21:20:49 CET 2008
I'm a bit rusty on this, but I believe you can conduct on singular-value decomposition on the 436 by 518 matrix. The squares of your singular values (max of 436, 518-436 will be zero) will be your eigenvalues, the same as in the PC analysis. The post-eigenvectors will be your components. As I have said, my knowledge is not completely trustworthy at this point, but SVD would be worth looking into.
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Noela Sánchez
Sent: Thursday, November 06, 2008 1:10 PM
To: stephen sefick
Cc: r-help at r-project.org
Subject: Re: [R] PCA
My matrix have 436 registers and 518 variables. I need to do a PCA analyst.
Usually I use princomp command to perform PCA analyst, but this time i can't because of my variables are more than my registers.
2008/11/6 stephen sefick <ssefick at gmail.com>
> would you please provide a dummy example that explains your problem.
> Then maybe I can help you.
> On Thu, Nov 6, 2008 at 1:42 PM, Noela Sánchez <noesanchez at udc.es> wrote:
> > I need perform PCA analyst with a matrix with more variables than units.
> > The princomp command don't match with this matrix.
> > Anybody knows a good command to do it?
> > --
> > Noela
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> Stephen Sefick
> Research Scientist
> Southeastern Natural Sciences Academy
> Let's not spend our time and resources thinking about things that are
> so little or so large that all they really do for us is puff us up and
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> annoying little problems of being mammals.
Grupo de Recursos Marinos y Pesquerías
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