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
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.
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