[R] logistic regression

[Liaw, Andy]

My suggestion would be a generalized additive model, which you can fit with
gam() in the `mgcv' package.  If you are adventureous you can also try it
`by hand' using glm() with spline terms.  You might also try lrm() with
splines (in the `Design' package) as described in Prof. Harrell's book
`Regression Modelling Strategies'.

HTH,
Andy

> From: Kevin Cummins
> 
> 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
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide! 
> http://www.R-project.org/posting-guide.html
> 
>