From dmbates at gmail.com  Tue Jul 19 18:48:18 2005
From: dmbates at gmail.com (Douglas Bates)
Date: Tue, 19 Jul 2005 11:48:18 -0500
Subject: [Rd] extracting and manipulating components from nlme and gnls
	objects
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On 7/19/05, Nicholas Lewin-Koh <nikko at hailmail.net> wrote:
> Hello,
> I am writing a set of functions to do prediction and calibration
> intervals
> for at least the subset of selfstarting models if not some more general
> ones.
> 
> I need to be able to extract the varFunction from a fit object
> and evaluate it at a predicted point. Are there any examples around?
> 
> Also in a self start model, say SSlogis, how would I get the gradient
> at a point?

I think that the output of 

example(SSlogis)

should answer that question for you.



[Rd] extracting and manipulating components from nlme and gnls objects
Douglas Bates