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Thread Subject:
Neural Network problem

Subject: Neural Network problem

From: phuong

Date: 23 Aug, 2013 21:06:06

Message: 1 of 2

I'm writing some codes about neural network. But I have some problem:
1. How can determine number of neuron with a trial and error method?
    should we do nay test for this? If you have some doc about this method for neuron, please share me link or file?
p/s: Please show me a clear code about trial and error to find number of neurons(I'm a newbie@@!!)
2. What the meaning of performance ?
3. With epochs, I see code stop with different number of epoch? So how can choose the optimal epochs?
Please help me solve some above problems.

Thanks for help!!!

Subject: Neural Network problem

From: Greg Heath

Date: 26 Aug, 2013 22:48:08

Message: 2 of 2

"phuong" wrote in message <kv8iru$mpc$1@newscl01ah.mathworks.com>...
> I'm writing some codes about neural network. But I have some problem:
> 1. How can determine number of neuron with a trial and error method?
> should we do nay test for this? If you have some doc about this method for neuron, please share me link or file?
> p/s: Please show me a clear code about trial and error to find number of neurons(I'm a newbie@@!!)

I have posted many examples in ANSWERS and the NEWSGROUP.. Some keywords (use a subset):

greg Ndof Hub Hmax

> 2. What the meaning of performance ?

Try the help and doc commands on each of the following

mse, sse, mae

> 3. With epochs, I see code stop with different number of epoch? So how can choose the optimal epochs?

tr.best_epoch

from

[ net tr ] = train(net,input,target);

Use the command (NO SEMICOLON!)

tr = tr

to see the results of training.
> Please help me solve some above problems.
>
> Thanks for help!!!

You are welcome.

Almost any question you have probably has been answered.

Try searching Answers and Newsgroup before posting a question.

Greg

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