From ripley@stats.ox.ac.uk  Fri Jan 26 20:58:32 2001
From: ripley@stats.ox.ac.uk (Prof Brian D Ripley)
Date: Fri, 26 Jan 2001 20:58:32 +0000 (GMT)
Subject: [Rd] Suggestion for an extension of the API
In-Reply-To: <3A71902D.87E0F755@olsen.ch>
Message-ID: <Pine.GSO.4.31.0101262053500.24921-100000@auk.stats>

On Fri, 26 Jan 2001, Adrian Trapletti wrote:

> Dear R Developers (I think in particular Brian)
>
> Especially for larger optimization problems, it would be nice to have an
> entry point for C/C++ code to the R optimizers (the ones which are called
> when using optim()), where the client just has to provide the functions
> fminfn() and fmingr() and calls directly, e.g., vmmin() (all from
> $RHOME/src/main/optim.c). Are there any plans for providing such an entry
> point?

No, but there can be.  There are at least some problems with error-handling
that need to be thought about.

Is what you want essentially to make vmmin (...) a public entry point,
avoiding having to deal with OptStruct's?  If that suffices, it would
be easy.

Brian

-- 
Brian D. Ripley,                  ripley@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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[Rd] Suggestion for an extension of the API
Prof Brian D Ripley