Michael: On Thu, Apr 19, 2012 at 9:20 PM, Michael <comtech....@gmail.com> wrote: > Hi all, > > I found that the PCA gave chaotic results when there are big changes in a > few data points. Yup.
> > Are there "improved" versions of PCA in R that can help with this problem? Yup. Consult the "Robust" task view on CRAN. You probably also ought to consult a local statistician, as understanding R/R covariance matrix estimates requires more statistical training than you've had.. But if not, the task view is the right R resource to start with. -- Bert > > Please give me some pointers... > > Thank you! > > [[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. -- Bert Gunter Genentech Nonclinical Biostatistics Internal Contact Info: Phone: 467-7374 Website: http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm ______________________________________________ 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.
