Essers, Jonah wrote:> So I recognize that:
>
> 1. many people hate forward stepwise regression (i've read the
archives)--but I need it
Why?
-Frank
>
> 2. step() or stepAIC are two ways to get a stepwise regression in R
>
> But here's the thing: I can't seem to figure out how to specify
that I want the criteria to be Mallow's Cp (and then to subsequently tell me
what the Cp stat is). I know it has something to do with scale=.....
>
> but the help pages dont specify exactly what to type in...I went to the
extractAIC help page and it too wasn't that helpful in explicitly telling me
what to type.
>
> Any help please? All I ask is that you don't flame me for not reading
the help pages or the archives. I've spent hours. I guess I'm just
inexperienced or something....
>
> thanks!
> jonah
>
> Jonah Essers, MD
> Clinical Fellow
> Division of Gastroenterology and Nutrition
> Children's Hospital Boston
> 300 Longwood Ave
> Boston, MA 02115
> 617-355-6058(tel)/617-730-0495(fax)
>
--
Frank E Harrell Jr Professor and Chair School of Medicine
Department of Biostatistics Vanderbilt University