[R] minimization routines in R

Emmanuel Paradis
Fri, 09 Jan 2004 12:35:13 -0000

At 22:02 08/01/2004 -0800, vous avez ?crit:
>I spent several hours trying out another function, nlm, which worked
>out so much better than optim. The iteration from nlm gives a very
>clear picture where the iteration is going while the two algorithms in
>optim just wander around. Thought this might be useful to others.

I confirm this statement from my (limited) experience with likelihood
estimation: I have used nlm for some time now and tried optim so see if the
results were similar, but the latter failed in spite of me trying several
methods. Anyway, nlm is much easier to use than optim.

Emmanuel Paradis


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