请问该如何使用工具箱？求具体说明过程。

Question

随机生成x1,x2,然后训练y(x1,x2)=sin(a*pi*x1)cos(b*pi*x2)。
当运行到net = train(net,P,T); 报错：
??? Error using ==> subsindex
Function 'subsindex' is not defined for values of class 'network'.

Error in ==> test at 20
net = train(net,P,T); 
求问如何使用train去训练多维input的情况？

程序如下
train=rand(100,2)*2-1;
traindata=[trainx1,trainx2,sin(0.4*pi.*trainx1).*cos(0.8*pi.*trainx2)];
% Construct training signal P and T 
P=traindata(:,1:2)'; 
T=traindata(:,3)'

%Plot training signal 
i=find(T>0.5); j=find(T<=0.5); 
x=P(1,i); y=P(2,i); 
x1=P(1,j); y1=P(2,j); 
plot(x,y,'o',x1,y1,'+') 

%Push a key to continue 
disp('Push a key to continue') 
pause 

%Define a neural network and train it with the training data 
net = newff([-0.5 0.5; -0.5 0.5], [18 1], {'tansig' 'logsig'}); 
net.trainParam.epochs = 5000; 
net = train(net,P,T); 

%Generate input data randomly 
x2=rand(1,5000)-0.5; 
y2=0.8*rand(1,5000)-0.4; 
P2=[x2;y2]; 

%Simulate the trained network 
T2 = sim(net,P2); 

%Check the generalization ability of the trained network 
ii=find(T2>0.5) 
plot(x,y,'o',x1,y1,'+',x2(ii),y2(ii),'o')
谢谢。

Answer 1

你的train函数已经被你重载为变量了，当然不能训练了。