[R] Method of L-BFGS-B of optim evaluate function outside of box constraints
shli at stat.wvu.edu
Thu Aug 21 20:58:54 CEST 2003
Hope this bug will be fixed in the future.
> On Wednesday 20 August 2003 15:44, Shengqiao Li wrote:
> > Hi, R guys:
> > I'm using L-BFGS-B method of optim for minimization problem. My function
> > called besselI function which need non-negative parameter and the besselI
> > will overflow if the parameter is too large. So I set the constraint box
> > which is reasonable for my problem. But the point outside the box was
> > test, and I got error. My program and the error follows. This program
> > depends on CircStats package.
> > Anyone has any idea about this?
> No idea... I can only say that a similar behaviour of optim
> with method="L-BFGS-B" (i.e. evaluation of the function
> outside the lower/upper limits) has occurred to me too.
> It is a rare but possible behaviour.
> Last June, I have sent a full description of the problem to
> r-bugs at r-project.org
> Adelchi Azzalini
> Adelchi Azzalini <azzalini at stat.unipd.it>
> Dipart.Scienze Statistiche, Università di Padova, Italia
> (please, no ms-word/ms-excel/alike attachments)
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