www.pudn.com > segment_ga.rar > select_2d1.m

function s1=select_2d1(X1,adapt_value1) 
     
    %选择算子 
     
    population=20; 
     
    total_adapt_value1=0; 
    for i=1:population 
        total_adapt_value1=total_adapt_value1+adapt_value1(i); 
    end 
    adapt_value1_new=adapt_value1/total_adapt_value1; 
     
     
    [yy,index]=sort(adapt_value1);              % 10%精英策略 
    s1(1:2,:)=X1(index(19:20),:); 
     
       
    r=rand(1,population-2);                       % 90%轮盘赌法 
     
    for i=3:population 
        temp=0; 
        for j=1:population 
            temp=temp+adapt_value1_new(j); 
            if temp>=r(i-2) 
                s1(i,:)=X1(j,:); 
                break; 
            end 
        end 
    end