[R] nlme

Spencer Graves spencer.graves at pdf.com
Sun Nov 19 19:48:10 CET 2006

      A more sensible option in my experience would be to transform the 
parameter space to send the boundaries to +/-Inf.  Suggested reading for 
'nlme' includes Pinheiro and Bates (2000) Mixed-Effects Models in S and 
S-Plus (Springer) and Bates and Watts (1988) Nonlinear Regression 
Analysis and Its Applications (Wiley). 

      Spencer Graves

Douglas Bates wrote:
> On 11/19/06, Fluss <rfluss at netvision.net.il> wrote:
>> Hello!
>> I am trying to fit a mixed non-linear model using nlme.
>> How can I constrain the fixed parameter space (add bounds) as in "nls".
> By rewriting the nlme function, an option I wouldn't recommend.  :-)
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