I found another function in the Advanced Signal Processing Toolkit under the 
 pallet Signal Processing/Time Series Analysis/Modeling and Prediction, there 
 are the functions TSA AR Modeling, TSA ARMA Modeling, TSA ARMA Prediction, etc. 
 What’s the difference between these sets of functions and the one under SI 
 analysis? How are their usages different, why are there two sets of two 
 functions where they appear to operate the same way?