Re: [R] Gamma for ordinal trends

From: Peter Dalgaard <p.dalgaard_at_biostat.ku.dk>
Date: Wed 31 Aug 2005 - 21:42:27 EST

Jonathan Baron <baron@psych.upenn.edu> writes:

> On 08/31/05 17:46, Wuming Gong wrote:
> > Dear list,
> >
> > Are there any functions for calculating gamma (and its standard
> > error), which measures the association of ordinal factors in I x J
> > contingency table. I did a RSiteSearch but did not find any clues...
>
> You have to look for Goodman-Kruskal gamma. It is a bit
> obscure. It is rcorr.cens in the Hmisc package.
>
> The significance test is the same as for Kendall's tau, according
> to some books.

Well, it would be if we handled ties in Kendall's tau correctly...

> I don't know about standard error.

-- 
   O__  ---- Peter Dalgaard             ุster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
 (*) \(*) -- University of Copenhagen   Denmark          Ph:  (+45) 35327918
~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk)                  FAX: (+45) 35327907

______________________________________________
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Received on Wed Aug 31 21:58:46 2005

This archive was generated by hypermail 2.1.8 : Fri 03 Mar 2006 - 03:40:00 EST