[R] How does nlm work?

[Jason Turner]

> 3) I have never heard of this step selections (line search, dogleg and
> optimal step). I would like to know something about it. I would
> appreciate if someone could send references for me to learn the subject.

IIRC, you'll find them here:

Nonlinear Regression Analysis and Its Applications
Douglas M. Bates and Donald G. Watts
John Wiley & Sons Inc.,
1988
ISBN: 0471816434

Cheers
Jason