crossover.m

来自「用matlab编写的采用遗传算法进行图像分割的一个程序」· M 代码 · 共 23 行

function [newpop]=crossover(oldpop,stringlength,a,b,pc);
pops=size(oldpop,1);
newpop=zeros(size(oldpop));
for i=1:pops/2
    if(rand<pc)
          cpoint=round(rand*(stringlength-2))+1;
          newpop(i,:)=[oldpop(i,1:cpoint),oldpop(pops/2+i,cpoint+1:stringlength),0,0];
          newpop(pops/2+i,:)=[oldpop(pops/2+i,1:cpoint),oldpop(i,cpoint+1:stringlength),0,0];         
    else
          newpop(i,:)=oldpop(i,:);
          newpop(pops/2+i,:)=oldpop(pops/2+i,:);
    end
end
for i=1:pops
     sum=0;
     for j=1:stringlength
         sum=sum+newpop(i,j)*2^(j-1);  
     end
         newpop(i,stringlength+1)=sum;%解码
         x=newpop(i,stringlength+1);
         newpop(i,stringlength+2)=fitness(x,pops,stringlength);    
 end