[R] minimization

Prof Brian Ripley ripley at stats.ox.ac.uk
Wed Sep 13 16:42:36 CEST 2000


On Wed, 13 Sep 2000, Heberto Ghezzo wrote:

> Hi, I got a code from S that uses 'nlminb' to minimize a function 
> with constraints. Is there a similar function in R?

optim(method="L-BFGS-B")

Both use box-constrained optimization.  Note that things like howyou
supply derivatives differ between the systems.

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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