Letters To S&C
Questions on Smoothing
I have recently become a subscriber to your magazine and also purchased back volumes of articles. I have
analyzed all articles pertaining to smoothing, and particularly to triple exponential average smoothing. I
am quite familiar with exponential averages but not what you define as triple exponential smoothing.
The articles show certain contradictions and all lack the essential analytical formulas. Why? Is not such
an analytical formula the essential conclusion of the discussion? Some show a BASIC program which
can be no better than the formula it is based on. It is often far more convenient to enter formulas directly
into a spreadsheet than writing a BASIC program. Maybe some of my questions warrant an article on the
subject, as surely other readers must have the same questions. Specifically, here are my questions:
A. May/June 83: "Data Filtering Methods" by Dr. Anthony Warren.