[R] Nonlinear Inference Regions

[Douglas Bates]

Thomas Hoffmann <hoffmann at ehmgs2.et.tu-dresden.de> writes:

> I would like to experiment with nonlinear inference regions (following
> chap. 6 of the Bates/Watts book).
> 
> I have used the nls library for fitting a nonlinear model to measured data
> but have some difficulties to apply "R speak" to the math of the above mentioned
> text.
> 
> Can anybody point me to an example of the computation of a variant of nonlinear
> inference regions using R? 

Some of those methods are already implemented in the nls package for
R.  For example, the creation of the profiles themselves and plotting the
profile-based marginal confidence intervals on the parameters is
available through profile() and plot.profile.nls().  See
 example(plot.profile.nls)
for an example.

We don't make use of the profile traces in this version of the
plots but the profile trace is available in the object created by
profile.
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