In article <aro9ud$e51$[EMAIL PROTECTED]>, Alexander Sirotkin <[EMAIL PROTECTED]> wrote:
>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. You probably want to just find the projections of the new data on the principle components you found before, which I presume are the inputs to your classification model. I think you don't want to find principle components all over again. Radford Neal . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
