[R] aov documentation page: question

Peter Dalgaard p.dalgaard at biostat.ku.dk
Mon Oct 25 15:02:42 CEST 2004

AJ Smit <smitaj at ukzn.ac.za> writes:

> Dear all
> I was looking at the aov documentation page and came across the
> following which seems like a contradiction to me:
> " This provides a wrapper to |lm| for fitting linear models to
> balanced or unbalanced experimental designs." (I presume 'This' refers
> to aov)
> and
> "|aov| is designed for balanced designs, and the results can be hard
> to interpret without balance"
> So, do I use it for unbalanced designs?

If you know how to interpret the results...

In general, I would avoid it if there is unbalance in the random
effects, but some designs with unbalance in the fixed effects are

   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907

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