R help - Jun 2010 - R and LINGO?

Good Evening
Does anyone in the R-help list have experience writing an R wrapper that
interfaces with the commercial packages LINGO and/or LINDO.api from R?

I have a set of nonlinear/mixed integer problems that solve nicely with LINGO
but I would like to use R to set the problems up and analyze/plot the solutions
dynamaically. I have searched the archives and have not found any R packages
that enable me to obtain solutions to mixed integer problems with linear and
quadratic constraints.

If I have missed one, we would be happy to hear which package we could consider
as an alternative to LINGO.
Any help or suggestions would be appreciated.

Brwin338

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>>>>> "b" == brwin338  <brwin338 at aol.com>
>>>>>     on Wed, 16 Jun 2010 19:55:17 -0400 writes:
    b> Good Evening
    b> Does anyone in the R-help list have experience writing an R wrapper
that interfaces with the commercial packages LINGO and/or LINDO.api from R?

    b> I have a set of nonlinear/mixed integer problems that solve nicely
with LINGO but I would like to use R to set the problems up and analyze/plot the
solutions dynamaically. I have searched the archives and have not found any R
packages that enable me to obtain solutions to mixed integer problems with
linear and quadratic constraints.

    b> If I have missed one, we would be happy to hear which package we could
consider as an alternative to LINGO.

The CRAN Task view on "Optimization",
direct link
       http://cran.r-project.org/web/views/Optimization.html

mentions many many R packages -- I assume almost all really 
"free" ("free" software, as in "free speech", not
as in "free beer");
for "mixed integer", it specifically mentions R's interface to
"Symphony", in the "Rsymphony" package.

(It has one short section on interfaces to commercial software,
"CPLEX",
 mentioned to also solve mixed integer problems)

    b> Any help or suggestions would be appreciated.

You are welcome!
Martin Maechler, ETH Zurich

    b> Brwin338

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