Matlab software experts ?

I have 2 cases. Case 1a - train data Case 1b - validation data

Both have two inputs (mass flow rate and pressure at inlet) and a output (Mass flow rate at outlet of a pipe).

I need my own code for modeling it with 90-95% fit. The model should be based on hammerstein weiner model. I need to upload that model in matlab system identification tool box.

Subject : Matlab l want solve that

yes, using Matlab