Re: FindMinimun Function
- To: mathgroup at smc.vnet.net
- Subject: [mg38393] Re: FindMinimun Function
- From: bghiggins at ucdavis.edu (Brian Higgins)
- Date: Fri, 13 Dec 2002 04:10:36 -0500 (EST)
- References: <at9egk$q7r$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Carlos , Have you tried to use NonlinearFit? Here is a simple example:
<< Statistics`NonlinearFit`
g[x_]:= 1- ( 1-x)^1/3
p[x_]:= 1- 3(1-x)^2/3 +2(1-x)
Generate some data with C1=2, C2=3
data = Table[{x, 2 g[x] + 3p[x]}, {x, 0, 1, .1}];
NonlinearFit[data, c1 g[x] + c2 p[x], {x}, {c1, c2}]
3.*(1 + 2*(1 - x) - (1 - x)^2) + 2.*(1 + (-1 + x)/3)
Cheers,
Brian
Carlos Espitia <emup98 at yahoo.com> wrote in message news:<at9egk$q7r$1 at smc.vnet.net>...
> Gentlemen;
> We are a research group on mineral processing of
> INGEOMINAS; which is a geological institute here in
> Colombia and are interested in knowing if could use
> this software to solve kinetics expression like the
> following:
>
> t= C1g(X)+C2p(X)
>
> Where
> g(x) = 1- ( 1-X)^1/3 and p(X) = 1- 3(1-X)^2/3 +2(
> 1-X); t=time(min); X = extent of reaction % ;
>
> According with bibliography ,through the method of
> Nedler and Mead (Flexible Polyhedron search method)C1
> and C2 can be obtained from minimization of the
> function.
>
> We would greateful if you could give us an orientation
> to solve our experimental problem. I would ask you an
> special collaboration to develop one example with the
> correct syntax using the experimental results sent in
> the attachment file. [contact the author to obtain
> this file). Thanks a lot for your
> collaboration and orientation.
>
> Carlos Espitia
> Georecursos Area
> INGEOMINAS Diagonal 53 # 34 ? 53
> Bogota ? Colombia
> Fax 57-1-2223515