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From: Sanjeev Rao on 1 May 2010 09:53
Hi Mike,

Thanks for the info..I think that should take care of the problem!

Regards,
Sanjeev


Mike Karr <mkarr(a)mathworks.com> wrote in message <hr75an$35o$1(a)fred.mathworks.com>...
> Sanjeev Rao wrote:
> > Hello everyone,
> >
> > I am using FMINCON, and I am trying to pass a variable computed in the
> > objective function file to the non linear constraint file. This is
> > because the variable I want to pass is dependent on the design parameter
> > which is being optimized. Both the computed variable and the design
> > parameter are needed in the constraint file to satisfy a nonlinear
> > constraint.
> >
> >
> > However, I am at a loss trying to figure out how to pass the extra
> > variable which is computed each time the optimizer runs, in addition to
> > the design parameter. Any help on this would be greatly appreciated.
> >
> > I tried to look at nested and anonymous functions, but the examples
> > listed show the extra parameters as constants, and hence can be passed
> > from the fmincon calling file itself.
> >
> > Any help on this would be greatly appreciated.
>
> Sorry for being late on this, I'm behind on CSSM.
>
> Put the call on fmincon in an outer function, and establish the
> variable, let's call it V, as a variable in this function. Then,
> defined both the objective function and the constraint function within
> the same outer function, where they can "see" V. The overall structure
> will look something like:
>
> function r = outer
> V = ...; % define V here
> function y = objective(X)
> ... % use V in this body
> end
> function [cceq] = constraint(X)
> ... % also use V in this body
> end
> r = fmincon(@objective,...,@constraint,...)
> end
>
> hth,
> mike
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