Cook-Weisberg confidence curves

I wouldn't know: what are these confidence curves you are attributing to
Cook-Weisberg?  

I am referring to Cook D & Weisberg S (1990) Confidence curves in
nonlinear regression. J. Am. Stat. Ass. 85, 544-551. 

Confint() seems to do what I want, thank you for your help.

Kari Ruohonen

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