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Topic: Specify/change the error used by train command
Replies: 4   Last Post: Feb 4, 2013 2:15 PM

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Posts: 6
Registered: 4/11/12
Re: Specify/change the error used by train command
Posted: Feb 4, 2013 2:35 AM
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> I don't understand.
> Please explain "output of the NN is multiplied by a system"
> If you know what the output of the system should be for a given NN input, why
> don't you just train the net to yield that desired output?
> Hope this helps.
> Greg

Thanks for reply, Greg

I have a desired target T and a plant system P. I want to use the NN as a controller which will be infron of the plant P. In more details, if the target T responds by an input in, then I insert the input to the NN to results, Onn, then this, Onn, will be used as input to the plant P. I want output of the plant P should track the target T. Therefore, I need the error T-P should be back propagated through the Plant Inverse and then used to train the NN. I am trying to use the train command and I don't figureout how to specify a special error to be used for the gradient in train command? Or any other suggestions.
I have to reprogram the whole feedforward and backpropagation from scratch without the facility which available in train command, I did it but it's slow and need a lot of work to specify the correct initials and gradient.

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