[R] confusing about contrasts concept

Peter Alspach PAlspach at hortresearch.co.nz
Wed Aug 16 22:01:35 CEST 2006


Bill Venables wrote an excellent explanation to the S list back in 1997.
I saved it as a pdf file and attach it herewith ...

Peter Alspach

> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of T Mu
> Sent: Thursday, 17 August 2006 3:23 a.m.
> To: R-Help
> Subject: [R] confusing about contrasts concept
> Hi all,
> Where can I find a thorough explanation of Contrasts and
> Contrasts Matrices?
> I read some help but still confused.
> Thank you,
> Tian
> 	[[alternative HTML version deleted]]
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> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.


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