i cant simulate my network, Error using network/sim Input data sizes do not match net.inputs{1}.size.

Hi,

I can't simulate a simple network, for example

% my input is x, and my output is y
x = [1:50];
y = 2*x;
% create the network
net = fitnet(10);
% train the network on x & y
train(net,x,y)
% so far things are ok! now let's simulate
xnew = 2.5;
ynew = sim(net,xnew);
%at this point i get the error

Why this happens? i above statements used to work fine 2 years ago when i used MATLAB, but now everytime i get the error below:

Error using network/sim

Input data sizes do not match net.inputs{1}.size.

Even if I use my input (x) into the sim command >> ynew = sim(net,x), i would still get this error.

Thanks,

Answer 1

[Ahmed Ghamdi]

i found the mistake,

for training, instead of writing

ThemeCopy

train(net,x,y)

i should write

ThemeCopy

[net,tr] = train(net,x,y)