So I am currently trying to establish an equation based on experimental data. during the experiment, I varied 2 variables, the ambient temperature and the ambient pressure. Each variable was modified 49 times and so I have 2401 results for the engine power generated.
What's the best method to use in order to find an equation that uses those 2 variables to give me the power output? Power=F(Tamb,Pamb)
So far, I've tried generating a polynomial equation function of each variable independently and trying to combine them afterwards, however the results generated using this method produced errors too large to be considered successful.