[R] lambda, uncertainty coefficient (& Somers D)

Marc Schwartz (via MN) mschwartz at mn.rr.com
Tue Apr 18 17:53:34 CEST 2006


On Tue, 2006-04-18 at 10:30 -0500, Marc Schwartz (via MN) wrote:
> On Tue, 2006-04-18 at 16:40 +0300, Antti Arppe wrote:
> > Dear colleagues in R,
> > 
> > Has anybody implemented the
> > 
> > 1) (Goodman & Kruskal) lambda
> > 
> > or the
> > 
> > 2) (Thiel's) uncertainty coefficient
> > 
> > statistics (in the asymmetric and symmetric forms), or is anyone aware 
> > that they might reside in some package? A search in the R archives 
> > does indicate that they are (somehow) part of the CoCo package, but I 
> > would rather not start learning how to transform my data into 
> > CoCo-format in order to access these functions, regardless of whether 
> > the CoCo versions are actually intended for calculating the actual 
> > statistic or for some other package internal purposes, as may 
> > sometimes be the case.
> > 
> > Furthermore, it appears to me that the 'somers2' function in the Hmisc 
> > package applies Somers' D only to 2x2 and not larger tables. Am I 
> > mistaken, or does there exist somewhere else an implementation of the 
> > Somers' D statistic for the more general RxC tables? This was queried 
> > in 1999, but no response seemed then to be forthcoming.
> > 
> > Thanks and regards,
> > 
> >  	-Antti Arppe
> 
> 
> Antti,
> 
> Under a separate e-mail to you, I have sent a text file containing R
> code for the above and other related association measures.
> 
> If anyone else is interested in these, please let me know and I will be
> more than happy to forward them on. I did not want to consume a lot of
> bandwidth here.
> 
> HTH,
> 
> Marc Schwartz


[Replying to r-help only]

Antti,

Each of my e-mails directly to you, including the code file, using
either:

  antti.arppe at helsinki.fi (located on your web page)

or 

  arppe at ling.helsinki.fi (used here)

have bounced, with access denied/user unknown errors.

Can you please confirm a correct e-mail address?

Thanks,

Marc




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