[R] Balanced Inc. Block Design

Peter Dalgaard BSA p.dalgaard at biostat.ku.dk
Wed Jul 31 10:48:00 CEST 2002

Winfried Theis <theis at statistik.uni-dortmund.de> writes:

> Hello!
> On 30-Jul-02 Erin Hodgess wrote:
> > Dear R People:
> > 
> > How can we do Balanced Incomplete Block Design from R, please?
> As far as I know there is no algorithm to construct BIB designs for arbitrary
> numbers of blocks, experimental units and replicates -- actually for some
> combinations no BIBD exist. For a list of different combinations and generating
> procedures see K. Hinkelmann and O. Kempthorne: Design and analysis of
> experiments, Wiley, New York

Or Cochran+Cox: Experimental Designs, Wiley. But did "do" mean design?
For analysis, aov() or (even lm() if systematic block effects are
assumed) should work. 

I'm not too sure how to handle recovery of interblock information from
aov() output though, but it most often isn't worth the trouble anyway.

   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
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