R help - Oct 2009 - Robust ANOVA with variance heterogeneity

Dear list members, 

I am looking for an alternative function for a two-way ANOVA in the case of
variance heterogeneity. For one-way ANOVA, I found oneway.test(), but I
didn't find anything alike for two-way ANOVA. Does anyone have a suggestion?

Thank you!

Maike Luhmann
Freie Universit?t Berlin

Dear Maike,

You could use the Anova() function in the car package with a
heteroscedasticity-consistent coefficient covariance matrix (via the
argument white.adjust=TRUE).

Regards,
 John

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at
r-project.org]
On
> Behalf Of Maike Luhmann
> Sent: October-02-09 3:05 AM
> To: r-help at r-project.org
> Subject: [R] Robust ANOVA with variance heterogeneity
> 
> Dear list members,
> 
> I am looking for an alternative function for a two-way ANOVA in the case
of
> variance heterogeneity. For one-way ANOVA, I found oneway.test(), but I
> didn't find anything alike for two-way ANOVA. Does anyone have a
suggestion?
> 
> Thank you!
> 
> Maike Luhmann
> Freie Universit?t Berlin
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

There are multiple routes to "robust" statistics, but the quick answer
to this question is probably friedman.test

I seem to remember a CRAN Task View on the area of Robust Statistics.

-- 
David Winsemius


On Oct 2, 2009, at 3:05 AM, Maike Luhmann wrote:
> Dear list members,
>
> I am looking for an alternative function for a two-way ANOVA in the  
> case of
> variance heterogeneity. For one-way ANOVA, I found oneway.test(),  
> but I
> didn't find anything alike for two-way ANOVA. Does anyone have a  
> suggestion?
>
> Thank you!
>
> Maike Luhmann
> Freie Universit?t Berlin