[R] Gamma for ordinal trends

[Jonathan Baron]

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.  I don't know about standard error.

Jon
-- 
Jonathan Baron, Professor of Psychology, University of Pennsylvania
Home page: http://www.sas.upenn.edu/~baron