Fit an equation with trained neural network

Hello,

How can I fit a trained neural network into an equation? Because modeling is worthless without an output equation.

Or what command should be used for a saved neural network with 4 variables (in command window)? I use "net(40,200,2,120)" but it makes a mistake.

Answer 1

[Greg Heath]

The single hidden layer feedforward net is a

     UNIVERSAL APPROXIMATOR!

In the default mode it's equation is

 y = B2 + LW*tanh(B1+IW*x)

 help fitnet

 doc fitnet

Hope this helps

Thank you for formally accepting my answer

Greg