select_2d1.m

遗传算法就的开始株型紧凑可执行：早晨从看见着在科学考察偶支持

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