On Dec 12, 2008, at 10:59 PM, js.augus...@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 ? se.contrast

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

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