数学建模社区-数学中国
标题:
求助 哪有问题啊!!!!!
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作者:
zyli
时间:
2012-7-22 13:11
标题:
求助 哪有问题啊!!!!!
cities= [18 87 74 71 25 58 4 13 18 24 71 64 68 83 58 54 51 37 41 2 7 22 25 62 87 91 83 41 45 44;54 76 78 71 38 35 50 40 40 40 42 44 60 58 69 69 62 67 84 94 99 64 60 62 32 38 46 26 21 35] ;
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t=30+1; %城市的数目是30个
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s=10; %样本的数目是1400个
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x=cities(1,
;
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y=cities(2,
;
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pop=zeros(s,t); %得初始的pop矩阵,矩阵的最后一列表示所在行的样本的路径距离
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for i=1:s
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pop(i,1:t-1)=randperm(t-1); %随机产生1—(t-1)的t-1个打乱的随机数
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end
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M=100;
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for l=1:1:2
for i=1:2:s-1
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%随机选择一个交叉点
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m=randperm(t-3)+1;
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crosspoint=min(m(1),m(2));
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%任意两行交叉
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x1=pop(i,
;
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x2=pop(i+1,
;
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k=0;
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for K=1:10
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while k==0
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if sqrt((x(x1(crosspoint))-x(x2(crosspoint)))^2+(y(x1(crosspoint))-y(x2(crosspoint)))^2)<M|sqrt((x(x2(crosspoint))-x(x1(crosspoint)))^2+(y(x2(crosspoint))-y(x1(crosspoint)))^2)<M
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pop(i,
=[pop(i,1:crosspoint),pop(i+1,crosspoint+1:t)];
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pop(i+1,
=[pop(i+1,1:crosspoint),pop(i,crosspoint+1:t)];
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%检查x1左边的重复性并得到x1的左边
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for j=1:crosspoint
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while find(x1(crosspoint+1:t)==x1(j))
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zhi=find(x1(crosspoint+1:t)==x1(j)); %确定重复位置
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temp=x2(crosspoint+zhi);
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x1(j)=temp;
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end
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end
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for j=1:crosspoint
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while find(x2(crosspoint+1:t)==x2(j))
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zhi=find(x2(crosspoint+1:t)==x2(j)); %确定重复位置
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temp=x1(crosspoint+zhi);
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x2(j)=temp;
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end
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end
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k=1;
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else
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m=randperm(t-3)+1;
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crosspoint=min(m(1),m(2));
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k=0;
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end
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end
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end
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end
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end
bestL=min(pop(:,t))
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J=pop(:,t);
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fi=1./J;
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[Oderfi,Indexfi]=sort(fi); %对于fi进行排序
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BestS=pop(Indexfi(s),
; %得到最短路
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I=BestS;
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for i=1:1:t-1
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x1(i)=x(I(i));
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y1(i)=y(I(i));
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end
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x1(t)=x(I(1));
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y1(t)=y(I(1));
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cities_new=[x1;y1];
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disp('Best Route is:');disp(cities_new);
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pos=[cities_new cities_new(:,1)];
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lentemp=0;
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for i=1:1:t-1
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temp=sqrt((pos(1,i)-pos(1,i+1))^2+(pos(2,i)-pos(2,i+1))^2);
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lentemp=lentemp+temp;
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end
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disp('Shortest Length is:');disp(lentemp);
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figure(1);
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subplot(1,2,1); %窗口分割的左边部分
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x(t)=x(1);y(t)=y(1);
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plot(x,y,'-or');
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xlabel('X axis'), ylabel('Y axis'), title('原始路径');
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axis([0,1,0,1]);
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axis([0,100,0,100]);
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axis on
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hold on;
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subplot(1,2,2); %窗口分割的右边部分
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plot(x1,y1,'-or');
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xlabel('X axis'), ylabel('Y axis'), title('最新的路径');
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axis([0,1,0,1]);
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axis([0,100,0,100]);
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axis on
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这只是遗传算法的交叉部分,现在有点问题,就是为什么去掉红色字体就可以运行出来,而加上后程序就没反应了呢?
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那位高人能找出原因,麻烦看看啊 ,不胜感激啊!
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