遗传算法matlab代码.txt

本算法是遗传算法的示例

遗传算法matlab代码
function youhuafun

D=code;
N=50;         % Tunable
maxgen=50;     % Tunable
crossrate=0.5; %Tunable
muterate=0.08; %Tunable
generation=1;  
num = length(D);
fatherrand=randint(num,N,3);
score = zeros(maxgen,N);
while generation<=maxgen
   ind=randperm(N-2)+2; % 随机配对交叉
   A=fatherrand(:,ind(1:(N-2)/2));
   B=fatherrand(:,ind((N-2)/2+1:end));
%     多点交叉
   rnd=rand(num,(N-2)/2);
   ind=rnd   tmp=A(ind);
   A(ind)=B(ind);
   B(ind)=tmp;

% % 两点交叉
%     for kk=1:(N-2)/2
%         rndtmp=randint(1,1,num)+1;
%         tmp=A(1:rndtmp,kk);
%         A(1:rndtmp,kk)=B(1:rndtmp,kk);
%         B(1:rndtmp,kk)=tmp;
%     end
   fatherrand=[fatherrand(:,1:2),A,B];
   
   % 变异
   rnd=rand(num,N);
   ind=rnd   [m,n]=size(ind);
   tmp=randint(m,n,2)+1;
   tmp(:,1:2)=0;
   fatherrand=tmp+fatherrand;
   fatherrand=mod(fatherrand,3);
%     fatherrand(ind)=tmp;
   
   %评价、选择
   scoreN=scorefun(fatherrand,D);% 求得N个个体的评价函数
   score(generation,:)=scoreN;
   [scoreSort,scoreind]=sort(scoreN);
   sumscore=cumsum(scoreSort);
   sumscore=sumscore./sumscore(end);
   childind(1:2)=scoreind(end-1:end);
   for k=3:N
       tmprnd=rand;
       tmpind=tmprnd       difind=[0,diff(tmpind)];
       if ~any(difind)
           difind(1)=1;
       end
       childind(k)=scoreind(logical(difind));
   end
   fatherrand=fatherrand(:,childind);    
   generation=generation+1;
end
% score
maxV=max(score,[],2);
minV=11*300-maxV;
plot(minV,'*');title('各代的目标函数值');
F4=D(:,4);
FF4=F4-fatherrand(:,1);
FF4=max(FF4,1);
D(:,5)=FF4;
save DData D

function D=code
load youhua.mat
% properties F2 and F3
F1=A(:,1);
F2=A(:,2);
F3=A(:,3);
if (max(F2)>1450)||(min(F2)<=900)
   error('DATA property F2 exceed it''s range (900,1450]')
end
% get group property F1 of data, according to F2 value
F4=zeros(size(F1));
for ite=11:-1:1
   index=find(F2<=900+ite*50);
   F4(index)=ite;
end
D=[F1,F2,F3,F4];

function ScoreN=scorefun(fatherrand,D)
F3=D(:,3);
F4=D(:,4);
N=size(fatherrand,2);
FF4=F4*ones(1,N);
FF4rnd=FF4-fatherrand;
FF4rnd=max(FF4rnd,1);
ScoreN=ones(1,N)*300*11;
% 这里有待优化
for k=1:N
   FF4k=FF4rnd(:,k);
   for ite=1:11
       F0index=find(FF4k==ite);
       if ~isempty(F0index)
           tmpMat=F3(F0index);
           tmpSco=sum(tmpMat);
           ScoreBin(ite)=mod(tmpSco,300);
       end
   end
   Scorek(k)=sum(ScoreBin);
end
ScoreN=ScoreN-Scorek;