I believe this has to do with numeric issues in nonlinear fitting and
interpolation, and is neither concerned with R programming nor trivial
to answer. I therefore suggest you post on the stats.stackexchange.com
for a fuller discussion of the issues.
Cheers,
Bert
Bert Gunter
Genentech Nonclinical Biostatistics
(650) 467-7374
"Data is not information. Information is not knowledge. And knowledge
is certainly not wisdom."
H. Gilbert Welch
On Mon, May 19, 2014 at 7:42 AM, Jun Shen <jun.shen.ut at gmail.com>
wrote:> Dear list,
>
> I have this nls model and trying to calculate the confidence interval for
> some parameter. I found if I use the default value level=0.95, confint can
> calculate a value; when I change the level=0.9, then it return :Error in
> prof$getProfile() : number of iterations exceeded maximum of 50.
>
> The strange thing is if I use level=0.8, it is working again. Why is that?
> How do I get an CI value for any level? Thanks.
>
> Jun Shen
>
> [[alternative HTML version deleted]]
>
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