Index in position 2 exceeds array bounds (must not exceed 1).

I am getting the following error with my code. I am making a neural network using narxnet and this error is coming in the preparenets function.

Index in position 2 exceeds array bounds (must not exceed 1).

Error in preparets (line 317)

xi = xx(:,FBS+((1-net.numInputDelays):0));

Error in narx (line 6)

[Xs,Xi,Ai,Ts] = preparets(net,x,{},y);

Here is my code:

data = xlsread('data230k1.xlsx');
x = data(1:81000,2)';
y = data(1:81000,1)';
net = narxnet(1:2,1:2,50);
[Xs,Xi,Ai,Ts] = preparets(net,x,{},y);
[net,tr] = train(net,Xs,Ts,Xi,Ai);
nntraintool;
Y = net(Xs,Xi,Ai);
E = gsubtract(Ts,Y);

Can someone help??

Answer 1

[Raunak Gupta]

Hi,

The above error is due to the input data x and y not being in the standard cell array format to be inputted to the narxnet. You can use tonndata for converting the vector x and y to cell array. For above code following changes to x and y will help:

data = xlsread('data230k1.xlsx'); 
x = data(1:81000,2)'; 
y = data(1:81000,1)'; 
xCell = tonndata(x,true,false); 
yCell = tonndata(y,true,false); 
net = narxnet(1:2,1:2,50); 
[Xs,Xi,Ai,Ts] = preparets(net,xCell,{},yCell); 
[net,tr] = train(net,Xs,Ts,Xi,Ai); 
nntraintool; 
Y = net(Xs,Xi,Ai); 
E = gsubtract(Ts,Y);

[Chahat Jain]

Thankyou so much. It worked.