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Message-ID: <CAMLNaBb406ZrR9tYV7J2thMMP7iqbjhEC7bDE01BEM3MdEaEFw@mail.gmail.com> Date: 2013-03-16T15:49:58Z From: john d Subject: help with PCA Dear all, If I do a PCA like this: dat<-matrix(rnorm(30),ncol=3) res<-prcomp(dat) Now, imagine that I got new data that I want to project onto the original PC axes. How do I do that? Thanks! John