Neola 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. Joe
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Noela Sánchez Sent: Thursday, November 06, 2008 1:10 PM To: stephen sefick Cc: r-help@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 <[EMAIL PROTECTED]> > would you please provide a dummy example that explains your problem. > Then maybe I can help you. > thanks > > Stephen > > On Thu, Nov 6, 2008 at 1:42 PM, Noela Sánchez <[EMAIL PROTECTED]> 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 > > > > [[alternative HTML version deleted]] > > > > ______________________________________________ > > R-help@r-project.org mailing list > > https://stat.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html<http://www.r-project.org/p > osting-guide.html> > > and provide commented, minimal, self-contained, reproducible code. > > > > > > -- > 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 > make us feel like gods. We are mammals, and have not exhausted the > annoying little problems of being mammals. > > -K. > Mullis > -- Noela Grupo de Recursos Marinos y Pesquerías Universidad de A Coruña [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
