[R] sample size/power calc packages
kjetil at entelnet.bo
Tue Nov 11 20:09:20 CET 2003
On 11 Nov 2003 at 7:55, John Fox wrote:
I have uploaded to CRAN a port of the asypow package for
S-Plus, but I am not sure if it is visible there yet.
> Dear Peter,
> At 12:30 PM 11/11/2003 +0100, Peter Dalgaard wrote:
> >rossini at blindglobe.net (A.J. Rossini) writes:
> > > For various reasons, I spent part of my time today looking at sample
> > > size and power calculation tools (don't ask, don't tell...). This
> > > seems to be one area that R is incredibly weak in (well, nearly all
> > > stat packages, except perhaps specialized tools and SAS); sure, there
> > > are a number of functions in various packages:
> > >
> > > base, statmod, Hmisc
> > >
> > > Have I missed something? (I would've expected at least one sequential
> > > computation, or non-standard design, but apparently there are none, or
> > > I missed it).
> > >
> > > I'd appreciate hearing about work that I've missed...
> >Is SAS particularly hot? I've just been explaining to people how to
> >cheat SAS Analyst into letting the Two-Sample t-Test sample-sizer do
> >binomial proportions with a fudged SD.
> There is an extensive set of power-calculation macros in SAS, by Ralph
> O'Brien, at <http://www.bio.ri.ccf.org/power.html>. Apparently SAS Version
> 9.1 will have new procs power and glmpower, which will cover most of what
> is in these macros.
> John Fox
> Department of Sociology
> McMaster University
> Hamilton, Ontario, Canada L8S 4M4
> email: jfox at mcmaster.ca
> phone: 905-525-9140x23604
> web: www.socsci.mcmaster.ca/jfox
> R-help at stat.math.ethz.ch mailing list
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