[R] extracting elements from summary(aov object)

[Peter Dalgaard BSA]

Bill Shipley <Bill.Shipley at Usherbrooke.ca> writes:

> Hello.  When one types "summary(fit)", where fit is an object from a
> call to aov(), one gets an ANOVA table.  I want to save just one
> element of this summary.  How does one extract this?
> 
> As an example, here is my output from a split plot ANOVA:
> 
>  > summary(out)$"Error: soil.cores$block:soil.cores$treatment"
>                       Df  Sum Sq Mean Sq F value Pr(>F)
> soil.cores$block      3 0.63626 0.21209  1.0557 0.4147
> soil.cores$treatment  3 0.90276 0.30092  1.4978 0.2802
> Residuals             9 1.80813 0.20090
> 
> I want to save only the F value of "soil.cores$treatment" .  In SPLUS
> one would do this by
> summary(out)$"Error: soil.cores$block:soil.cores$treatment"$"F
> value"[2] but this doesn't seem to work.

R seems to require an extra [[1]] bit before $"F value". Don't ask me
why...

-- 
   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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