R help - Oct 2004 - constrained opt with lagrange multiplier example?

I'm curious to find out if there is an example of R code for optimization
of two variable function, with contraints, using lagrange multiplier
(using optim/nlm?). I have a problem that contains one discrete variable,
but need a simple problem/example to start with.

I haven't been able to find any examples and thought I should ask here
before I plunged into writing a few miles of R code.

Thanks,
Jeff.


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Jeff D. Hamann
Forest Informatics, Inc.
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