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 <dwinsem...@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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David Winsemius, MD
Heritage Laboratories
West Hartford, CT

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