select.m

来自「使用遗传算法求一个多项式函数在区间[0」· M 代码 · 共 14 行

function [y]=select(x,sumfit)
% variable 'x' stands for fitness
popsize=length(x);
sum=0;
pick=rand(1);
% avgfit=x./sumfit
for m=1:popsize+1           % this design is not perfect,because there exist a bug
    if sum<pick             % warning:the first and the last element
        sum=sum+x(m)/sumfit;
    else
        break;
    end
end
y=m-1;