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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
//
// 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-en.txt
function demo_derivative()
mprintf(_("Running optimization ...\n"));
function f = rosenbrock ( x )
f = 100.0 *(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 );
end
if ((ind == 1) | (ind == 4)) then
g = derivative ( rosenbrock , x.' , order = 4 );
end
endfunction
x0 = [-1.2 1.0];
[ 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
//
filename = 'optim_withderivative.sce';
dname = get_absolute_file_path(filename);
editor ( dname + filename );
endfunction
demo_derivative();
clear demo_derivative;
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