Chapter 4 Convenience functions for your convenience

The following scripts are part of the chapter 4 code:

correlation.py 
   Run with python correlation.py

mode.py
   Run with python mode.py

obv.py
   Run with python obv.py

polynomials.py
   Run with python polynomials.py 3

simulation.py
   Run with python simulation.py 0.999

smoothing.py
   Run with python smoothing.py 8