[R] Estimates at each iteration of optim()?

Peter Dalgaard p.dalgaard at biostat.ku.dk
Mon Apr 23 08:46:47 CEST 2007

> I am trying to maximise a complicated loglikelihood function with the "optim" command. Is there some way to get to know the estiamtes at each iteration? When I put "control=list(trace=TRUE)" as an option in "optim", I just got the initial and final values of the loglikelihood, number of iterations and whether the routine has converged or not. I need to know the estimate values at each iteration.
It might help if you actually _read_ the description of the trace 
control parameter (hint: it is not an on/off switch) in ?optim... And, 
as it says, this is method dependent, so you may have to study the 
source code.

> Deepankar
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