From nikko at hailmail.net  Tue Jul 19 18:15:52 2005
From: nikko at hailmail.net (Nicholas Lewin-Koh)
Date: Tue, 19 Jul 2005 11:15:52 -0500
Subject: [Rd] extracting and manipulating components from nlme and gnls
	objects
Message-ID: <1121789752.13362.238783805@webmail.messagingengine.com>

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?

Thanks
Nicholas

PS I am sure I will have more questions



[Rd] extracting and manipulating components from nlme and gnls objects
Nicholas Lewin-Koh