Hi,
I am using "biplot" (in package "stats") to visualize the results of some PCA analyses. When I use scale=0 in the biplot function, it draws X (PC1) and Y (PC2) axes, with the scales multiplied by sqrt(N), where N is the sample size. Is there a way to change these scales so that the actual values of PC1 and PC2 are shown, instead of multiplication by sqrt(n)? Also, how can I plot the points in biplot with different colors or symbols corresponding to a grouping variable, instead of sample row number? Thanks for any suggestions. Best, Ravi. ---------------------------------------------------------------------------- ------- Ravi Varadhan, Ph.D. Assistant Professor, The Center on Aging and Health Division of Geriatric Medicine and Gerontology Johns Hopkins University Ph: (410) 502-2619 Fax: (410) 614-9625 Email: [EMAIL PROTECTED] Webpage: http://www.jhsph.edu/agingandhealth/People/Faculty/Varadhan.html ---------------------------------------------------------------------------- -------- [[alternative HTML version deleted]] ______________________________________________ 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.
