xybpens.m

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),[15 1],{'tansig','purelin'},'trainlm');
net_1=init(net_1);
net_1=train(net_1,P,T);
net_2=newff(minmax(P),[10 1],{'tansig','purelin'},'traingdx');
net_2=init(net_2);
net_2=train(net_2,P,T);
net_3=newff(minmax(P),[20 1],{'tansig','logsig'},'traingda');
net_3=init(net_3);
net_3=train(net_3,P,T);
for i=1:3
   net_i.trainParam.epochs=2000;
   net_i.trainParam.goal=0.01;
   net_i.trainParam.show=50;
   a=sim(net_i,P);
end