R help - Mar 2011 - error in nls, step factor reduced below minFactor

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?

Regards
Steven P. Greiner, Ph.D.

Risk Head / FactSet Research System
311 South Wacker
Chicago, IL 60606
sgreiner@factset.com<mailto:sgreiner@factset.com>
312 566 5109 (w)
585 261 7138 (c)


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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)
>
>
> 	[[alternative HTML version deleted]]
>
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