[R-sig-ME] using weights=varIdent in lme: how to change reference level of grouping factor?

Emma emma_knight at ymail.com
Thu Jul 18 04:22:46 CEST 2013

Ben Bolker <bbolker at ...> writes:

>   I have spent some time delving through the guts of lme()
> but haven't figured it out yet.  I'm somewhat baffled,
> as the default order of factor() should be Female, Male in
> any case, so I don't see where the order could be getting
> messed up.

Hi Ben,
Thanks for having a look at this.
I think lme is using the category with the largest number of observations as
the reference level.
I have no idea how to change this.

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