On Tue, 2005-04-05 at 22:54 -0400, John Sorkin wrote:
> Please forgive a straight stats question, and the informal notation.
>
> let us say we wish to perform a liner regression:
> y=b0 + b1*x + b2*z
>
> There are two ways this can be done, the usual way, as a single
> regression,
> fit1<-lm(y
This is possible if x and z are orthogonal, but in general it doesn't
work as you have noted. (If it did work it would almost amount to a way
of inverting geenral square matrices by working one row at a time, no
going back...)
It is possible to fit a bivariate regression using simple linear
regre
