R-alpha: nlm and gradients

Douglas Bates bates@stat.wisc.edu
21 Nov 1997 08:28:34 -0600

At present the documentation for nlm refers the reader to Dennis and
Schnabel for details on the algorithms.  It also states that the
function is liable to change.

Can anyone tell me if the current version of nlm uses only function
values or if it can use gradients and Hessians when they are
available?  I would like to get an idea of how difficult it would be
to port the development versions of our linear mixed-effects code.

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