[R] Robust ANOVA with variance heterogeneity

David Winsemius dwinsemius at comcast.net
Sat Oct 3 20:45:08 CEST 2009


Do you have a citation for that statement? I cannot convince myself  
that it should be true.

After looking at the CRAN Task View, I would suggest the OP look at   
rlm(MASS) or lmrob(robustbase).

-- 
David

On Oct 2, 2009, at 11:05 AM, Kjetil Halvorsen wrote:

> On Fri, Oct 2, 2009 at 8:45 AM, David Winsemius <dwinsemius at comcast.net 
> > wrote:
>> There are multiple routes to "robust" statistics, but the quick  
>> answer to
>> this question is probably friedman.test
>
> I don't think friedman.test is robust to variance heterogeneity. It is
> only robust to
> non-normality.
>
> Kjetil
>
>
>
>>
>> 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 Universität Berlin
>>
>> ______________________________________________
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>> 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.
>>

David Winsemius, MD
Heritage Laboratories
West Hartford, CT




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