% Wayburn-Seader 2 function L. LAURENT -- 27/02/2017 -- luc.laurent@lecnam.net
0001 %% Wayburn-Seader 2 function 0002 % L. LAURENT -- 27/02/2017 -- 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 %1 minimum global: f(0.2,1)=0 0025 % 0026 %Design space -500<xi<500 0027 0028 function [p,dp] = funWayburnSeader2(xx) 0029 0030 %constants 0031 a=1.613; 0032 b=4; 0033 c=0.3125; 0034 d=1.625; 0035 e=1; 0036 0037 %evaluation and derivatives 0038 x=xx(:,:,1); 0039 y=xx(:,:,2); 0040 % 0041 pa=a-b*(x-c).^2-b*(y-d).^2; 0042 pb=y-e; 0043 % 0044 p=pa.^2+pb.^2; 0045 0046 if nargout==2 0047 dp=zeros(size(xx)); 0048 dp(:,:,1)=-4*b*(x-c).*pa; 0049 dp(:,:,2)=-4*b*(y-d).*pa+2*pb; 0050 end 0051 end 0052