[R] Standard error of mean for aov

David Winsemius dwinsemius at comcast.net
Sat Dec 13 15:04:28 CET 2008

On Dec 12, 2008, at 10:59 PM, JS.Augustyn at gmail.com wrote:

> Hi all,
> I'm quite new to R and have a very basic question regarding how one  
> gets
> the standard error of the mean for factor levels under aov. I was  
> able to
> get the factor level means using:
> summary(print(model.tables(rawfixtimedata.aov,"means"),digits=3)),
> where rawfixtimedata.aov is my aov model. It doesn't appear that  
> there is
> an equivalent function to get the standard errors for the factor  
> levels.
> I searched through the help archives and documentation but could not  
> find
> anything that would help resolve my problem. I'm sure there is a  
> trivial
> solution, but I would sincerely appreciate having someone more expert
> dispel my ignorance.

  Have you looked at the help page for model.tables? ... and perhaps ? 

There are arguments to that function that result in standard errors  
for _effects_. If standard errors on the contrasts are not what you  
wanted, then perhaps a full example would help.

David Winsemius

> Cheers,
> Jason Augustyn
> 	[[alternative HTML version deleted]]
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