[R] unbalanced design

Berton Gunter gunter.berton at gene.com
Wed Dec 1 23:13:09 CET 2004

This is a standard "gotcha" in linear models. Gets me, too. Try ?C and
?contr.sum to help you understand. Also Venables's and Ripley's MASS 4 ,
section 6.2 gives a short not too technical summary; any linear models text
will provide a more complete (and more technical) discussion.

-- Bert Gunter
Genentech Non-Clinical Statistics
South San Francisco, CA
"The business of the statistician is to catalyze the scientific learning
process."  - George E. P. Box

> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Damián Cirelli
> Sent: Wednesday, December 01, 2004 2:03 PM
> To: r-help at stat.math.ethz.ch
> Subject: Re: [R] unbalanced design
> Thanks Peter,
> I still wonder why it thinks it's unbalanced...

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