[R] Which function to use for multiple comparison?

Aboubakar Maitournam
Tue, 09 Jul 2002 07:58:43 -0000

> Thomas Lumley wrote:
>
> > On Mon, 8 Jul 2002, Julie Cong wrote:
> >
> > >        [Moderator: This was erronously sent to R-announce,
> > >                  and filtered fortunately ]
> > >
> > > Hi,
> > >
> > > This is my first time to use R. I'm wondering which function
I can use to do
> > > multiple comparison. I have an lm object and want to do multiple
comparison
> > > based on this object. Splus has a function multicomp() but I
could not find
> > > a similar one in R. Thanks in advance. Really appreciate it.
> > >
> >
> > At the moment the multiple comparisons features in R are a bit
limited.
> >
> >    p.adjust does a number of corrections of p-values that are very
general
> >
> >    pairwise.t.test is another interface to these same methods
> >
> >    TukeyHSD provides Tukey's Honestly Significant Difference
> >
> > help.search("comparison") suggests that the npmc package
might also be
> > helpful.
> >
> >         -thomas
> >
> >
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>
> I think that the package multtest which must go with version R-1.5.0 is
relatively
> complet
> in term of multiple comparisons based on t-test(paired or not), Wilcoxon
> test(paired or not)
> F test with the the adjustment of p_values.
>
> Best regards.
>
> Aboubakar Maitournam.