[R] what is the .Machine$double.xmin for a 64 bit machine?
S.O.Nyangoma at amc.uva.nl
Tue Jul 12 11:06:39 CEST 2005
I use a 32 bit machine. For those using 64 bit machines,
what is the .Machine$double.xmin for for machines?
----- Original Message -----
From: Achim Zeileis <Achim.Zeileis at wu-wien.ac.at>
Date: Tuesday, July 12, 2005 10:51 am
Subject: Re: [R] exact values for p-values - more information.
> On Tue, 12 Jul 2005, S.O. Nyangoma wrote:
> > > If they have the same degrees of freedom, use the test statistic
> > > and not
> > > the p value for comparing them.
> > > Z
> > I appretiate your input to this discussion. Do you know of a
> reference> to your statement above?
> ?? Any basic statistics book? Distribution functions tend to be
> > I had actually used the test-statistic which in my case is r-
> > to compare them. This is in my view was adequate but I also
> think it
> > is more convincing to say something about the p-values
> Not really `more' convincing, it's all pretty equivalent when the
> numberof estimated parameters is the same. You can also compare
> the fitted
> models via their associated residual sum of squares which I would
> most intuitive because that is the objective function you are
> trying to
> minimize via OLS.
> > (difficulties
> > in computing them, and hence the rationale of solely using the
> > stat).
> > regards. Stephen.
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