[R] Extracting t values from object of class `"pairwise.htest"'

[Peter Dalgaard BSA]

"Marc Schwartz" <mschwartz at medanalytics.com> writes:

> > -----Original Message-----
> > Achim Zeileis writes:
> >  > Sven Garbade wrote:
> >  > >
> >  > > Hi,
> >  > >
> >  > > can I extract the p-values after a pairwise comparision with
> >  > > pairwise.t.test()? The object of class "pairwise.htest".
> >  >
> >  > This is a list with one component being "p.value". You can extract
> it as
> >  > usual with
> >  >   pairwise.t.test()$p.value
> > 
> > Sorry, I don't mean the p-values, but the t-values.
> 
> That would be:
> 
> pairwise.t.test(...)$statistic
> 
> Look at ?t.test and scroll to the "Value" section which defines the list
> components returned.

But pairwise.t.test doesn't return the individual t statistics. It
ends with

    ans <- list(method = METHOD, data.name = DNAME, p.value = PVAL, 
        p.adjust.method = p.adjust.method)
    class(ans) <- "pairwise.htest"
    ans

so you'd have to modify the function to get at the actual t statistics.

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907
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