How to edit weights and bias of narxnet?

Question

Sarwmitra Sharma 2020-7-1

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回答： Shubham Rawat 2020-8-14

I want to change weights and bias of narx neural network manually. I have this code. but no change is observed.

Y1 = net(Xs,Xi,Ai);
wb=getwb(net);
net=setwb(net,wb*0);
wb=getwb(net);
Y2 = net(Xs,Xi,Ai);

Y1 and Y2 give same result. it seems that changing weights and bias dont change results. If this is not the correct way then how to change weights and bias such that it changes the output of neural network?

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Sarwmitra Sharma 2020-7-1

the above code works for forwardfeed network but not for narxnet?

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Answer 1

Shubham Rawat 2020-8-14

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Hi Sarwmitra,

To change the weights and biases in NARX net:

You can train the NARX network for a loop first, and then set the weight and bias. the codes are as follows:

Y1 = net(Xs, Xi, Ai); 
 
net.IW{1} =  %value%  %the input-to-hidden layer weights 
net.LW{2} = %value% %the input-to-output layer weights 
net.b{1} = %value% %the input-to-hidden layer bias 
net.b{2} = %value% %the input-to-output layer bias 
 
Y2 = net(Xs,Xi,Ai);