func.m

我改写的多变量带约束的遗传算法Matlab源程序！

function Y = Func( x )
% Objective Function: Min Y = (x1-1)^2+(x2-2)^2+1

% %subject to: 0<=x1<=2; 0<=x2<=3; 2<=x3<=4;
%Y = (x(:,1)-1).^2+(x(:,2)-2).^2+(x(:,3)-3).^2+1;


% subject to: 0<=x1<=2; 0<=x2<=3; 2<=x3<=4; x1+x2<=2.5; x2+x3<=4.5;
for i = 1:length(x(:,1))
    
    Y(i) = (x(i,1)-1).^2+(x(i,2)-2).^2+(x(i,3)-3).^2+1;
    
    if (x(i,1)+x(i,2)>2.5)
        Y(i) = (x(i,1)-1).^2+(x(i,2)-2).^2+(x(i,3)-3).^2+1 - 300*(2.5-x(i,1)-x(i,2));
    end
    if (x(i,2)+x(i,3)>4.5)
        Y(i) = (x(i,1)-1).^2+(x(i,2)-2).^2+(x(i,3)-3).^2+1 - 300*(4.5-x(i,2)-x(i,3));
    end
end

Y = Y';