Dear All,
 
Using:-
R : Copyright 2005, The R Foundation for Statistical Computing
Version 2.1.1  (2005-06-20), ISBN 3-900051-07-0
 and 
 
 Jose Pinheiro, Douglas Bates, Saikat DebRoy and Deepayan Sarkar (2005). nlme: Linear and
 nonlinear mixed effects models. R package version 3.1-65.

on a WINDOWS 2000 machine
 
I am trying to run the scripts from the Mixed Models book and am running into some difficulty - could any one tell me why this doesn't work (from pages 369 - 370) 
 
 
CO2  #FINE
plot(CO2,outer= ~Treatment*Type,layout=c(4,1)) #FINE
 
fm1CO2.lis <- nlsList( SSasympOff, CO2 ) #FINE
fm1CO2.lis #FINE
 

fm1CO2.nlme <- nlme( fm1CO2.lis ) #COPIED DIRECTLY FROM BOOK!!??
 
Gives the error message:-
 
Error in nlme.formula(model = uptake ~ SSasympOff(conc, Asym, lrc, c0),  : 
        Maximum number of iterations reached without convergence

 
Any assistance would be greatly appreciated
 
Guy Forrester
 
 
 
 
 
--------------------------------------------------------
Guy J Forrester
Biometrician
Manaaki Whenua - Landcare Research
PO Box 69, Lincoln, New Zealand.
Tel. +64 3 325 6701 x3738
Fax +64 3 325 2418
E-mail ForresterG@LandcareResearch.co.nz 
www.LandcareResearch.co.nz 



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