xybp.asv

一些MATLAB的程序,,其中有BP神经网络集成的程序,在数据处理时采用归一化函数

load G:\matlab\work\xy
P=x';
T=y';
P=premnmx(P);             
T=premnmx(T);

net_1=newff(minmax(P),[20 1],{'tansig','purelin'},'trainlm');
net_1=init(net_1);
net_1.trainParam.epochs=2000;
net_1.trainParam.goal=0.003;
net_1.trainParam.show=50;
[net_1,tr]=train(net_1,P,T);
a=sim(net_1,P);

net_2=newff(minmax(P),[10 1],{'tansig','tansig'},'traingdx');
net_2=init(net_2);
net_2.trainParam.epochs=2000;
net_2.trainParam.goal=0.003;
net_2.trainParam.show=50;
[net_2,tr]=train(net_2,P,T);
b=sim(net_2,P);

net_3=newff(minmax(P),[15 1],{'tansig','purelin'},'traincgf');
net_3=init(net_3);
net_3.trainParam.epochs=2000;
net_3.trainParam.goal=0.003;
net_3.trainParam.show=50;
[net_3,tr]=train(net_3,P,T);
c=sim(net_3,P);
y=(a+b+c)/3;
figure;
plot(y,'r');