[R] error in nls, step factor reduced below minFactor

Keith Jewell k.jewell at campden.co.uk
Tue Mar 29 10:58:09 CEST 2011

      warnOnly a logical specifying whether nls() should return instead of 
signalling an error in the case of termination before convergence. 
Termination before convergence happens upon completion of maxiter 
iterations, in the case of a singular gradient, and in the case that the 
step-size factor is reduced below minFactor.

hope that helps

Keith J

"Peter Ehlers" <ehlers at ucalgary.ca> wrote in message 
news:4D9143CA.6060301 at ucalgary.ca...
> On 2011-03-28 10:25, Steve Greiner wrote:
>> Hello,
>> I've seen various threads on people reporting:
>> step factor 0.000488281 reduced below `minFactor' of 0.000976563
>> While I know how to set the minFactor, what I'd like to have happen is 
>> for nls to return to me, the last or closest fitted parameters before it 
>> errors out.  In other words, so I don't get convergence, I'd still like 
>> to acquire the values of the parameters last tried?  Can you tell me how 
>> get nls to return to me the last set of parameters rather than just 
>> stopping?
> Isn't that what setting trace=TRUE does?
> Peter Ehlers
>> Regards
>> Steven P. Greiner, Ph.D.
>> Risk Head / FactSet Research System
>> 311 South Wacker
>> Chicago, IL 60606
>> sgreiner at factset.com<mailto:sgreiner at factset.com>
>> 312 566 5109 (w)
>> 585 261 7138 (c)
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