funStepInt

PURPOSE ^

% Step Int function

SYNOPSIS ^

function [p,dp] = funStepInt(xx)

DESCRIPTION ^

% Step Int function
 L. LAURENT -- 28/04/2017 -- luc.laurent@lecnam.net

CROSS-REFERENCE INFORMATION ^

This function calls: This function is called by:

SOURCE CODE ^

0001 %% Step Int function
0002 % L. LAURENT -- 28/04/2017 -- 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 %
0025 %global minimum : f(xi)=25 pour (x1,x2,x3,x4)=(0,...,0)
0026 %Design space: -5<xi<5
0027 
0028 
0029 function [p,dp] = funStepInt(xx)
0030 
0031 %constant
0032 a=25;
0033 
0034 %evaluation and derivatives
0035 pa=floor(xx);
0036 %
0037 p=25+sum(pa,3);
0038 
0039 if nargout==2
0040     %function for testinf integer
0041     fun=@(input) (imag(input) == 0) & (round(input) == input);
0042     isInt=fun(xx);
0043     %
0044     dp=zeros(size(xx));
0045     dp(isInt)=1/eps;
0046 end
0047 end

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