% Schaffer N2 1st objective function L. LAURENT -- 09/05/2018 -- luc.laurent@lecnam.net
0001 %% Schaffer N2 1st objective function 0002 %L. LAURENT -- 09/05/2018 -- luc.laurent@lecnam.net 0003 0004 % sources available here: 0005 % https://bitbucket.org/luclaurent/optigtest/ 0006 % https://github.com/luclaurent/optigtest/ 0007 0008 % optiGTest - set of testing functions A toolbox to easy manipulate functions. 0009 % Copyright (C) 2017 Luc LAURENT <luc.laurent@lecnam.net> 0010 % 0011 % This program is free software: you can redistribute it and/or modify 0012 % it under the terms of the GNU General Public License as published by 0013 % the Free Software Foundation, either version 3 of the License, or 0014 % (at your option) any later version. 0015 % 0016 % This program is distributed in the hope that it will be useful, 0017 % but WITHOUT ANY WARRANTY; without even the implied warranty of 0018 % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 0019 % GNU General Public License for more details. 0020 % 0021 % You should have received a copy of the GNU General Public License 0022 % along with this program. If not, see <http://www.gnu.org/licenses/>. 0023 0024 function [p,dp]=funObjMultiSchaffer21(xx) 0025 0026 %constants 0027 a=1; 0028 b=2; 0029 c=3; 0030 d=4; 0031 0032 %responses and derivatives 0033 IXa=find(xx<=a); 0034 IXb=find(a<xx&xx<=c); 0035 IXc=find(c<xx&xx<=d); 0036 % 0037 p=xx-d; 0038 % 0039 p(IXa)=-xx(IXa); 0040 p(IXb)=xx(IXb)-b; 0041 p(IXc)=d-xx(IXc); 0042 0043 if nargout==2 0044 % 0045 dp=ones(size(xx)); 0046 % 0047 dp(IXa)=-dp(IXa); 0048 dp(IXc)=-dp(IXc); 0049 end 0050 end