As I believe I already told you, look at the CRAN Robust task view. -- Bert
On Sun, Apr 22, 2012 at 6:29 PM, Michael <comtech....@gmail.com> wrote: > Even in R, there are so many of "robust PCA"... any survey or review of all > these different methods? > > On Sun, Apr 22, 2012 at 6:58 PM, Joshua Wiley <jwiley.ps...@gmail.com>wrote: > >> On Sun, Apr 22, 2012 at 4:43 PM, Michael <comtech....@gmail.com> wrote: >> > I actually tried "robustPca" in "pcaMethods" on bioconductor. >> > >> > It keeps giving me the warning "Input data is not complete"... >> > >> > Reading into the function: >> > >> > When there is no "NA"s, it will give this warning... >> > >> > It seems that there is a bug in this code... >> > >> > Is it reliable at all? >> > >> > --------------------- >> > >> > >> >> robustPcafunction (Matrix, nPcs = 2, verbose = interactive(), ...) >> > { >> > nas <- is.na(Matrix) >> > if (!any(nas) & verbose) { >> > cat("Input data is not complete.\n") >> > cat("Scores, R2 and R2cum may be inaccurate, handle with care\n") >> > } >> >> that seems to issue the notes when there are *not any missing* and >> verbose is TRUE. I would submit a bug report to the author. >> >> > >> > >> > >> > >> > >> > On Fri, Apr 20, 2012 at 9:58 AM, Kevin Wright <kw.s...@gmail.com> wrote: >> > >> >> You can also have a look at the pcaMethods package on Bioconductor. >> >> >> >> Kevin >> >> >> >> >> >> On Thu, Apr 19, 2012 at 11:20 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. >> >>> >> >>> Are there "improved" versions of PCA in R that can help with this >> problem? >> >>> >> >>> 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<http://www.r-project.org/posting-guide.html> >> <http://www.r-project.org/posting-guide.html> >> >>> and provide commented, minimal, self-contained, reproducible code. >> >>> >> >> >> >> >> >> >> >> -- >> >> Kevin Wright >> >> >> >> >> > >> > [[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/posting-guide.html> >> > and provide commented, minimal, self-contained, reproducible code. >> >> >> >> -- >> Joshua Wiley >> Ph.D. Student, Health Psychology >> Programmer Analyst II, Statistical Consulting Group >> University of California, Los Angeles >> https://joshuawiley.com/ >> > > [[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.