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// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) 2009 - DIGITEO - 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_derivative()
mprintf(_("Running optimization ...\n"));
function f = rosenbrock ( x )
f = 100*(x(2)-x(1)^2)^2 + (1-x(1))^2;
endfunction
function [ f , g , ind ] = rosenbrockCost2 ( x , ind )
if ind == 1 | ind == 4 then
f = rosenbrock ( x );
g = numderivative ( rosenbrock , x.' , [], order = 4 );
end
endfunction
x0 = [-1.2 1];
[ f , x ] = optim ( rosenbrockCost2 , x0 );
//
// Display results
//
mprintf("x = %s\n",strcat(string(x)," "));
mprintf("f = %e\n",f);
//
// Load this script into the editor
//
m = messagebox(_("View Code?"), "Question", "question", [_("Yes") _("No")], "modal")
if m == 1
filename = "optim_withderivative.sce";
dname = get_absolute_file_path(filename);
editor ( dname + filename );
end
endfunction
demo_derivative();
clear demo_derivative;
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