[R] logistic regression

Spencer Graves spencer.graves at pdf.com
Mon Aug 2 18:00:14 CEST 2004

      Have you considered function "glm" with some polynomial in the 
independent variable?  Regarding a more general reference, have you seen 
Venables and Ripley (2002) Modern Applied Statistics with S, 4th ed. 
(Springer)?  If the answer to either of these questions is "no", you 
might get many answers to these and related questions from these 
references, including working the examples provided with the "glm" 
documentation -- and in reading the posting guide! 

      hope this helps.  spencer graves

Kevin Cummins wrote:

> I have a system with a binary response variable that was hypothesized 
> to follow a simple logistic function. The relationship between the 
> continuous independent variable and the logit is clearly not 
> monotonic. I have two questions. 1) Can anyone recommend a reference 
> that describes my modeling options in this case, and 2) what 
> facilities does R have to deal with this situation?
> Thanks,
> Kevin Cummins
> School of Medicine
> University of California San Diego
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