%人工魚群算法format longVisual=2.5;Step=0.3;N=50;Try_number=50;a1=-10;b1=10;a2=-10;b2=10;d=[];h=1e-1;Friend_number=50;k=0;m=50;X1=rand(N,1)*(b1-a1)+a1;X2=rand(N,1)*(b2-a2)+a2;X=[X1 X2];%人工魚數量for i=1:Nwwww=[X(i,1),X(i,2)];d(i)=maxf(wwww);end[w,i]=max(d);maxX=[X(i,1),X(i,2)];%初始公告板記錄maxY=w;%初始公告板記錄figurex=[];figurey=[];figurez=[];figurex(numel(figurex)+1)=maxX(1);figurey(numel(figurey)+1)=maxX(2);figurez(numel(figurez)+1)=maxY;kkk=0;while(k<m)    for i=1:N        XX=[X(i,1),X(i,2)];%人工魚當前狀態Xi    nf=0;    Xc=0;    for j=1:N  %聚群行為開始       XXX=[X(j,1),X(j,2)];       if(norm(XXX-XX)<Visual)       nf=nf+1;       Xc=Xc+XXX;       end    end    Xc=Xc/nf;   if((maxf(Xc))>maxf(XX))        XXnext1=XX+rand*Step*(Xc-XX)/norm(Xc-XX);           if(XXnext1(1)>b1)        XXnext1(1)=b1;           end        if(XXnext1(1)<a1)        XXnext1(1)=a1;           end        if(XXnext1(2)>b2)        XXnext1(2)=b2;           end        if(XXnext1(2)<a2)        XXnext1(2)=a2;           end   else       XXnext1=gmjprey(XX,Try_number,Visual,Step);       if(XXnext1(1)>b1)        XXnext1(1)=b1;           end        if(XXnext1(1)<a1)        XXnext1(1)=a1;           end        if(XXnext1(2)>b2)        XXnext1(2)=b2;           end        if(XXnext1(2)<a2)        XXnext1(2)=a2;           end   end%聚群行為結束   %maxX=XX;%追尾行為開始   %maxY=maxf(XX);   for j=1:Friend_number     XXX=[X(j,1),X(j,2)];     if(norm(XXX-XX)<Visual & maxf(XXX)>maxY)         maxX=XXX;         maxY=maxf(XXX);     end   end   if((maxY)>maxf(XX))       XXnext2=XX+rand*Step*(maxX-XX)/norm(maxX-XX);         if(XXnext2(1)>b1)        XXnext2(1)=b1;           end        if(XXnext2(1)<a1)        XXnext2(1)=a1;           end        if(XXnext2(2)>b2)        XXnext2(2)=b2;           end        if(XXnext2(2)<a2)        XXnext2(2)=a2;           end   else      XXnext2 =gmjprey(XX,Try_number,Visual,Step);      if(XXnext2(1)>b1)        XXnext2(1)=b1;           end        if(XXnext2(1)<a1)        XXnext2(1)=a1;           end        if(XXnext2(2)>b2)        XXnext2(2)=b2;           end        if(XXnext2(2)<a2)        XXnext2(2)=a2;           end   end%追尾行為結束   if(maxf(XXnext1)>maxf(XXnext2))     X(i,1)=XXnext1(1);     X(i,2)=XXnext1(2);   else     X(i,1)=XXnext2(1);     X(i,2)=XXnext2(2);   endend %一次迭代結束  for i=1:N    XXXX=[X(i,1),X(i,2)];       if maxf(XXXX)>maxY            maxY=maxf(XXXX);            maxX=XXXX;            figurex(numel(figurex)+1)=maxX(1);            figurey(numel(figurey)+1)=maxX(2);            figurez(numel(figurez)+1)=maxY;       endend    k=k+1; %進入下一次迭代end   maxXmaxYplot3(figurex,figurey,figurez)