How much number of hidden neurons should I take in nprtool ?

Answer 1

[Greg Heath]

It is always best to

 1. Accept all defaults
 2. Run
 3. Evaluate the non-training validation and test results
 4. If satisfactory, consider reducing H, the number of hidden nodes

If unsatisfactory,

 1. Consider changing to non-default values
 2. Consider changing to a command line approach so that you can use loops to create multiple designs more easily. For example I usually use an outer loop with 10 candidates for H and an inner loop of Ntrials = 10 different weight initializations for each H candidate.
 3. For command line examples search 

     greg Ntrials

Hope this helps.

Thank you for formally accepting my answer

Greg