bp1.m

bp神经网络识别数字

net=newff([-1 2; 0 5],[3,1],{'tansig','purelin'},'traingd');
net.trainParam.show = 50; 
net.trainParam.lr = 0.05; 
net.trainParam.epochs = 300; 
net.trainParam.goal = 1e-5; 
p = [-1 -1 2 2;0 5 0 5]; 
t = [-1 -1 1 1]; 
net=train(net,p,t); 

a = sim(net,p)