search for: tp19182643p19197360

I want to fit something like: z = b0 + b1*x + b2*y Since x, y,and z all have measurement errors attached, the proper way to do the fit is with principal components analysis, and to use the first component (called loadings in princomp output). My dumb question is: how do I convert the princomp output to equation coefficients in the format above? I guess another dumb question would be: how about