[R] two questions for R beginners

[RICHARD M. HEIBERGER]

On Thu, Feb 25, 2010 at 5:39 PM, Carl Witthoft <carl at witthoft.com> wrote:
> Well, here goes...
>
> I still wish there were a really good monograph on the use and
> implementation of factors.

To get a good handle on factors, and the sets of contrasts they encode,
it is really necessary to study a good statistics book.  I recommend mine

Statistical Analysis and Data Display, An Intermediate Course with
Examples in S-Plus, R, and SAS,
Richard M. Heiberger and Burt Holland, Springer 2004

But I will acknowledge that other books are available.

Rich