[R] glm x^2

[Sundar Dorai-Raj]

I think you want:

glm(y ~ x + I(x^2), ...)

This is shown as an example on pg 50 of "An Introduction to R" 
(R-2.2.0-pdf).

HTH,

--sundar

Jeffrey Stratford wrote:
> R-users,
> 
> I'm having some trouble getting .glm and glm.nb to run a polynomial. 
> I've used x*x and x^2 and neither works.  I've checked out the archives
> and they refer to an archive that's no longer working.  
> 
> I've seen that they use poly() but I'm following up my analysis with
> cv.glm so I'd prefer to keep using glm.  It's easier to just add a
> column to my data but I'd rather code it.
> 
> Thanks for the response... I appreciate the people that work on the
> list.
> 
> Jeff
> 
> ****************************************
> Jeffrey A. Stratford, Ph.D.
> Postdoctoral Associate
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