On 6/14/07, michael watson (IAH-C) <[EMAIL PROTECTED]> wrote: > ... I failed to find articles that compare and contrast PCA > and MDS. If you know of any, of course I would be happy to read them.
There's an excellent non-R discussion of a wide range of ordination methods at http://ordination.okstate.edu/ (Mike Palmer's work). If you look under "distance-based ordination" (like MDS/PCO), you find: "Special case: for Euclidean distance, PCoA = PCA." and much other useful information. He also gives an extensive list of references from the literature, if you'd like something more rigorous. For an overview text, I'm partial to _Numerical Ecology_ by Legendre and Legendre (1998) because of its readability, but there are many more good texts. Sarah -- Sarah Goslee http://www.functionaldiversity.org ______________________________________________ R-help@stat.math.ethz.ch 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.
