[R] trouble with model.tables SE means

[David Winsemius]

On Dec 22, 2009, at 4:22 PM, Jon Prince wrote:

> Hi, I'm new to R, with some experience with Matlab and SPSS. I've  
> figured out how to run my repeated measures anova and am getting the  
> right numbers for my effects (comparing with results from other  
> software), but am having trouble with the model.tables function.  
> Specifically, using:
>
> prints the means, but then won't do the SE values, instead giving:
>
>   Warning message:
> In model.tables.aovlist(fm, "means", se = TRUE) :
> SEs for type 'means' are not yet implemented"
>
> Asking for SEs for "effects" works fine, but that's not what I want.  
> I searched the help for this issue and one other person has had this  
> problem last year (http://markmail.org/message/k5yxxqcfiihvzvtp?q=list:r-project+model%2Etables 
> ), but the person helping them was unable to replicate it, inferring  
> that it was an out-of-date version. My version is:
>
>   R version 2.10.1 (2009-12-14)
>
> I only downloaded it the other day, and therefore cannot have an  
> outdated version. How can I fix this error and get my SE values?  
> Apologies if I have not provided sufficient information, and thanks  
> in advance for your help.

When I look at the output of the first model.tables call copied from  
the help page, I see a list element that holds "se" values. Try:

model.tables(fm,"means",se=TRUE)$se

-- 
David

>
> Jon
>
> -- 
> Jon Prince
> Postdoctoral Research Associate


David Winsemius, MD
Heritage Laboratories
West Hartford, CT