[R] Passing additional paramaters to nlsList(nlme) fit function

[Dieter Menne]

Original question...

> > is it possible to pass additional parameters to the model function that are
> > known and groupwise constant with nlsList? I could not find something like a
> > "keep this fixed" option in the documentation and the code (my fault...?)

Spencer Graves <spencer.graves <at> pdf.com> writes:

> 
> 	  The "nlsList" function does NOT have the common ellipsis ("..." ) 
> argument to support that.
...
> 	  If it were my problem, I might make a local copy of the "nlsList" 
> function and try to modify it to work, at least for my problem.  In this 
> case, "nlsList" is merely a call to "UseMethods".  To get beyond that, I 
> requested 'methods("nlsList")' with the following result:
> 
> 	  nlsList.formula    nlsList.selfStart*

Thanks, Spencer. When I studied the quinModel example (page 380, 
Pinheiro/Bates) I noted that it is possible to pass non-varying parameters to 
nlme by not including them in the fixed=... parameter. As quite a few examples 
in PB used nlsList for the first approximation (and, as far I understand, nlme 
does it internally anyway) I had missed this feature of nlme, even if the PB-
book heavily use-stained.

Dieter