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yeyu370784

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注册: 2013-03-02

[求助] 跪求rbf程序调试

为什么我运行下面的程序，老提示我 In mean at 219 ，Divide by zero？
就是这条语句 Centers(:,i)=mean(SamIn(:,Index)')';
求高人指点

clc
clear

data=xlsread('date.xls');
train=data(1:70,

;
test=data(71:77,

;
SamNum=70;  %训练样本
TestSamNum=7; %
Overlap=[0.25 0.1 0.2];

%输入输出矩阵
%训练数据
SamIn=train(:,1:3)';
SamOut=train(:,4:6)';
%预测数据
TestSamIn=test(:,1:3)';
TestSamOut=test(:,4:6)';

%节点数
InDim=3;  %输入节点
ClusterNum=38;  %隐含节点

%初始化中心
Centers=SamIn(:,1:ClusterNum);
NumberInClusters=zeros(ClusterNum,3);
IndexInClusters=zeros(ClusterNum,SamNum);

%迭代求解均值中心
while 1
NumberInClusters=zeros(ClusterNum,3);
IndexInClusters=zeros(ClusterNum,SamNum);

%计算样本点到中心的距离
for i=1:SamNum
      AllDistance=dist(Centers',SamIn(:,i));
      [MinDist,Pos]=min(AllDistance);
      NumberInClusters(Pos)=NumberInClusters(Pos)+1;
      IndexInClusters(Pos,NumberInClusters(Pos))=i;
end

OldCenters=Centers;

%根据中心聚类，并得到新的类内均值
for i=1:ClusterNum
      Index=IndexInClusters(i,1:NumberInClusters(i));
      Centers(:,i)=mean(SamIn(:,Index)')';
end

%判断中心有没有变化
EqualNum=sum(sum(Centers==OldCenters));
if EqualNum==InDim*ClusterNum
      break
end
end

AllDistances=dist(Centers',Centers);
Maximun=max(max(AllDistance));
for i=1:ClusterNum
AllDistances(i,i)=Maximun+1;
end
Spreads=Overlap*min(AllDistances)';

Distance=dist(Centers',Samln);
SpreadsMat_l=repmat(Spreads(:,1),1,SamNum);
SpreadsMat_2=repmat(Spreads(:,2),1,SamNum);
SpreadsMat_3=repmat(Spreads(:,3),1,SamNum);
HiddenUnitOut_1=radbas(Distance./SpreadsMat_1);
HiddenUnitOut_2=radbas(Distance./SpreadsMat_2);
HiddenUnitOut_3=radbas(Distance./SpreadsMat_3);
HiddenUnitOutEx_1=[HiddenUnitOut_l' ones(SamNum,1)]';
HiddenUnitOutEx_2=[HiddenUnitOut_2' ones(SamNum,1)]';
HiddenUnitOutEx_3=[HiddenUnitOut_3' ones(SamNum,1)]';
W2Ex_1=SamOut(1,

*pinv(HiddenUnitOutEx_1);
W2Ex_2=SamOut(2,

*pinv(HiddenUnitOutEx_2);
W2Ex_3=SamOut(3,

*pinv(HiddenUnitOutEx_3);
W2_1=W2Ex_l(:,1:ClusterNum);
B2_1=W2Ex_l(:,ClusterNum+1);
W2_2=W2Ex_2(:,1:ClusterNum);
B2_2=W2Ex_2(:,ClusterNum+1);
W2_3=W2Ex_3(:,1:ClusterNum);
B2_3=W2Ex_3(:,ClusterNum+1);

TestDistance=dist(Centers',TestSamln);
TestSpreadsMat_l=repmat(Spreads(:,1),1,TestSamNum);
TestSpreadsMat_2=repmat(Spreads(:,2),1,TestSamNum);
TestSpreadsMat_3=repmat(Spreads(:,3),1,TestSamNum);
TestHiddenUnitOut_1=radbas(TestDistance./TestSpreadsMat_1);
TestHiddenUnitout_2=radbas(TestDistance./TestSpreadsMat_2);
TestHiddenUnitOut_3=radbas(TestDistance./TestSpreadsMat_3);
TestNNOut_1=W2_1*TestHiddenUnitOut_1+repmat(B2_1,[1,TestSamNum]);
TestNNOut_2=W2_2*TestHiddenUnitOut_2+repmat(B2_2,[1,TestSamNum]);
TestNNOut_3=W2_3*TestHiddenUnitOut_3+repmat(B2_3,[l,TestSamNurn]);
TestNNOut(1,

=TestNNOut_l;
TestNNOut(2,

=TestNNOut_2;
TestNNOut(3,

=TestNNOut_3;
plot(TestSamIn,TestNNOut(1,

,'k-');
hold on

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