Question

BP神经网络matlab程序出错，还请各位不吝赐教，谢谢了

matlab程序如下：
p1=data(1:19580,1:3);
>> p2=data(19581:59905,1:3);
>> p3=data(59906:104097,1:3);
>> p4=data(104098:157722,1:3);
>> P1=[p1;p2;p3;p4]';
>> t1=data(1:19580,4);
>> t2=data(19581:59905,4);
>> t3=data(59906:104097,4);
>> t4=data(104098:157722,4);
>> T1=[t1;t2;t3;t4]';
>> net=newff(minmax(P1),[10,4],{'tansig','logsig'},'trainlm');
>> net.trainParam.epochs=50;
>> net.trainParam.goal=0.01;
>> net=train(net,P1,T1);
data数据格式如下：

程序报错如下：
Warning: NEWFF used in an obsolete way.
> In obs_use at 18
In newff>create_network at 127
In newff at 102
See help for NEWFF to update calls to the new argument list.

Error using network/train (line 272)
Output data size does not match net.outputs{2}.size.

Answer 1

你应该用的是新版的matlab，但是你的newff却是按照旧版的格式来输入的，所以出错。
修改为net=newff(P1',T1',10,{'tansig','logsig'},'trainlm')。10为隐含层的神经元个数，输入层和输出层由输入样本和输出样本决定（新版matlab自动根据样本情况设定），tansig为隐含层到输出层的传输函数，logsig为输出层到输出的传输函数

追问

按照改后，运行又出现了这个错误