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From: John on 20 Apr 2010 15:23
Hello, I'm trying to confirm the parameters used in the FMINSEARCH function for the Nelder-Mead method nonlinear optimization (direct search) method to ensure that the necessary parameters are implemented for the convergence of my problem. I've tried looking through FMINSEARCH, OPTIMSET and OPTIMGET but haven't gotten anywhere.

As I'm not specifying any options, is there somewhere I can check the default parameters? A Nelder-Mead method has four parameters: coefficients of reflection (rho), expansion (chi), contraction (gamma) and shrinkage (sigma).

Any guidance would be appreciated. Thanks so much.
From: James Allison on 20 Apr 2010 15:51
Type edit fminsearch. You can find the parameter values you are looking
for about a third of the way down.

-James

John wrote:
> Hello, I'm trying to confirm the parameters used in the FMINSEARCH
> function for the Nelder-Mead method nonlinear optimization (direct
> search) method to ensure that the necessary parameters are implemented
> for the convergence of my problem. I've tried looking through
> FMINSEARCH, OPTIMSET and OPTIMGET but haven't gotten anywhere.
>
> As I'm not specifying any options, is there somewhere I can check the
> default parameters? A Nelder-Mead method has four parameters:
> coefficients of reflection (rho), expansion (chi), contraction (gamma)
> and shrinkage (sigma).
>
> Any guidance would be appreciated. Thanks so much.
From: John on 21 Apr 2010 13:05
Awesome! Thanks.

James Allison <james.allison(a)mathworks.com> wrote in message <hql0jp$f7t$1(a)fred.mathworks.com>...
> Type edit fminsearch. You can find the parameter values you are looking
> for about a third of the way down.
>
> -James
>
> John wrote:
> > Hello, I'm trying to confirm the parameters used in the FMINSEARCH
> > function for the Nelder-Mead method nonlinear optimization (direct
> > search) method to ensure that the necessary parameters are implemented
> > for the convergence of my problem. I've tried looking through
> > FMINSEARCH, OPTIMSET and OPTIMGET but haven't gotten anywhere.
> >
> > As I'm not specifying any options, is there somewhere I can check the
> > default parameters? A Nelder-Mead method has four parameters:
> > coefficients of reflection (rho), expansion (chi), contraction (gamma)
> > and shrinkage (sigma).
> >
> > Any guidance would be appreciated. Thanks so much.
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