On Wed, 22 Jun 2005, Guohui Ding wrote: > prcomp(stats) Principal Components Analysis > princomp(stats) Principal Components Analysis > scale(base) Scaling and Centering of Matrix-like Objects
The first two are correct for PCA, but scale is not MDS. MDS is available in cmdscale (stats), isoMDS (MASS), sammon (MASS) and elsewhere. >> I am not familar with R. I want to use PCA (principal components >> analysis) and MDS (multidimensional scaling). Can someone tell me >> which R package I should use for PCA and MDS? I appreciate your help >> in advance. -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ 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
