System Identification(narx : nonlinear autoregressive) for MISO(multi input single output) by codes( command window not by using app/tool box)

Hello there. I am trying to predict time series using system identification by codes (not toolbox). Because I could not find ways to do MISO by using system identification tool box (command : ident).

There are 3 inputs and 1 output. I have time series data of 3 inputs and 1 output prepared for 3 hours (distinct time period = 1 sec). I want to use first 1 hour data for estimation and the other 2 hours for validation.

I had some idea using 'iddata' and 'merge' but I don't have any more than that. Can anyone have some idea about applying nonlinear sigmoid network using custom regressors(no. of terms and whether using regressors in nonlinear block or linear block).

[Saeid Shakiba]

Hello.

You can use this link:

https://nl.mathworks.com/help/ident/examples/nonlinear-arx-models-with-custom-regressors.html