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// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) 2008-2009 - INRIA - Michael Baudin
// Copyright (C) 2010 - DIGITEO - Allan CORNET
// Copyright (C) 2012 - Scilab Enterprises - Adeline CARNIS
//
// This file must be used under the terms of the CeCILL.
// This source file is licensed as described in the file COPYING, which
// you should have received as part of this distribution. The terms
// are also available at
// http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt
function demo_nelder_rosen()
mprintf(_("Defining Rosenbrock function ...\n"));
function [ y , index ] = rosenbrock ( x , index )
y = 100*(x(2)-x(1)^2)^2+(1-x(1))^2;
endfunction
x0 = [-1.2 1.0]';
nm = neldermead_new();
nm = neldermead_configure(nm, "-numberofvariables", 2);
nm = neldermead_configure(nm, "-function", rosenbrock);
nm = neldermead_configure(nm, "-x0", x0);
nm = neldermead_configure(nm, "-maxiter", 300);
nm = neldermead_configure(nm, "-maxfunevals", 300);
mprintf(_("Searching (please wait) ...\n"));
nm = neldermead_search(nm);
fx0 = neldermead_get(nm, "-fx0");
mprintf("f(x0) = %f, x0=[%s]\n" , fx0 , strcat(string(x0), " "));
xopt = neldermead_get(nm, "-xopt");
fopt = neldermead_get(nm, "-fopt");
mprintf("f(xopt) = %f, xopt=[%s]\n" , fopt , strcat(string(xopt), " "));
nm = neldermead_destroy(nm);
mprintf(_("End of demo.\n"));
//
// Load this script into the editor
//
m = messagebox(_("View Code?"), "Question", "question", [_("Yes") _("No")], "modal")
if(m == 1)
filename = "neldermead_rosenbrock.sce";
dname = get_absolute_file_path(filename);
editor ( dname + filename, "readonly" );
end
endfunction
demo_nelder_rosen();
clear demo_nelder_rosen;
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