On Jul 7, 2011, at 05:01 , Thomas Lumley wrote: > On Thu, Jul 7, 2011 at 12:58 PM, Jim Silverton <jim.silver...@gmail.com> > wrote: >> Dear all, >> >> I want to simulate from the null distribution of the following 2 x 3 table, >> >> 2 5 10 >> 4 8 5 >> >> I am using a chi-squared test. >> Anyone has any idea how to do this? > > The r2dtable() function will simulate tables with a given set of row > and column totals.
Or, as a shortcut, maybe look into chisq.test(..., simulate.p.value=TRUE). Notice that both use hypergeometric-type sampling. One could also consider sampling with rmultinom (either of order 6, twice of order three, or thrice of order 2), or even rpois, assuming a Poisson distribution of the total count. > > -thomas > > -- > Thomas Lumley > Professor of Biostatistics > University of Auckland > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. -- Peter Dalgaard Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Email: pd....@cbs.dk Priv: pda...@gmail.com ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
