function ret=Aim1(x)
% Rosenbrock function 

global sizepop  lenchrom
 
bound=[-2.048 2.048;-2.048 2.048];   % 函數自變量的范圍

% 將binary數組轉化成十進制數組
n=1;
for i=1:length(lenchrom)     
    data(i)=0;
    for j=lenchrom(i)-1:-1:0
        data(i)=data(i)+x(n).*2.^j;
        n=n+1;    
    end
end
data=bound(:,1)'+data./(2.^lenchrom-1).*(bound(:,2)-bound(:,1))';
        
% 計算適應度
ret=100*(data(1)^2-data(2))^2+(1-data(1))^2;    %-2.048<=xi<=2.048, i=1,2;