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% f6.m % Schaffer's F6 function % commonly used to test optimization/global minimization problems % % z = 0.5+ (sin^2(sqrt(x^2+y^2))-0.5)/((1+0.01*(x^2+y^2))^2) function [out]=f6(in) x=in(:,1); y=in(:,2); num=sin(sqrt(x.^2+y.^2)).^2 - 0.5; den=(1.0+0.01*(x.^2+y.^2)).^2; out=0.5 +num./den;