R-alpha: nlm

Paul Gilbert pgilbert@bank-banque-canada.ca
Fri, 21 Nov 1997 11:08:38 -0500

>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.


If you don't get the answer you need regarding nlm, I have some
multivariate code which may help. The code has one problem I know about
(the Hessian estimate is off) but mostly I think it is working well.


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