Hello. I know that I'm not welcome on that list but maybe someone will still shed some light on a question I'm trying to solve through all weekend. I use princomp() to get a PCA components and then use these components to build a classification model. When I use new data with that model (data which I did not have when I did the original PCA), I have to aplly a PCA first and then use PCA components with my model. The problem is - I would like (actually, I think I have) to use an eigenbasis from the first PCA when I do a PCA on a new data. So the question is - how can I use the eigenbasis (loadings ??) from princomp() output as an argument to another princomp() when processig a new data. Thanks in advance. P.S. I know I managed to annoy quite a few people here - well, these people - plz. ignore my posting. -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._