Neural network simulation

Is it possible to use the neural network toolbox to create scenarios for the output? As I understand, the sim function gives a forecast of the output. However, what I want is to create several scenario paths to capture the risk in the future values of the output variable.

Thanks for help!

[Greg Heath]

Insufficient information and explanation.

Answer 1

[Greg Heath]

Add random noise to the test data to get performance vs snr.

Better yet, systematically add noise to all the data to get a number of nets, each of which was designed at a constant SNR level. Then, for each net, test with each of the noise levels to get a performance matrix of size SNRtrain x SNRtest.