try prcomp instead of princomp
On Thu, Nov 6, 2008 at 3:20 PM, Lucke, Joseph F <[EMAIL PROTECTED]> wrote: > 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. > ______________________________________________ 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.
