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

[Spencer Graves]

	  The "nlsList" function does NOT have the common ellipsis ("..." ) 
argument to support that.

	  An alternative is use "vector" to create an object of mode "list" of 
the desired length, then in a loop call "nls" (which does support "...") 
and store the results in a list.  However, this won't produce an object 
of class "nlsList", which means that the methods writted for "nlsList" 
will not be available to you.

	  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*

	  If you supply your own starting values, you don't need 
"nlsList.selfStart".  If you do need it, you can get it via 
'getAnywhere("nlsList.selfStart")';  the asterisk ("*") says that this 
function is "non-visible", which means that just typing its name won't 
get it.  Then I might use "debug" to figure out what it's doing and what 
I want to change.

	  hope this helps.
	  spencer graves

Dieter Menne wrote:

> Hello, nls-users,
> 
> 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...?)
> 
> The current workaround is to break the problem down into groups and use
> globals to pass the constant parameters, but it is ugly code and won't work
> when an over-all nlme is needed.
> 
> Dieter Menne
> 
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