[R] contrast matrix in package multcomp

[Torsten Hothorn]

> Hi,
> 
> I've got a problem building a contrast matrix for the Dunnet contrast in
> package multcopm. 

<snip>

> > summary(simtest(adiff ~ trial, cmatrix=C))
> Error in simtest.formula(adiff ~ trial, cmatrix = C) :
>  dimensions of x and cmatrix do not match
> 

difficulties like that should now be fixed in multcomp_0.3-0 (on CRAN). We
re-wrote the code for the formula interface which is now able to deal with
any configuration of covariables, see ?simtest for some examples. 

Additionally, the factor levels are now printed in the summary and print
methods. Many thanks to Martin Maechler for very helpful comments!

Torsten

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