John Holt -
Is it possible to acquire a plugin or better still a formulae to calculate
the above in excel for Mac. I am aware of such tools in Excel for Windows.
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For an equally-weighted moving average, you may use Add Trendline on your XY
(Scatter) or Line chart. Or, you can use the AVERAGE worksheet function on
your worksheet time series data.
For exponential smoothing, you may use Tools | Data Analysis | Exponential
Smoothing. (Excel's Analysis ToolPak must be installed; see Excel's Help for
instructions.) Or, use worksheet formulas with appropriate weighting of your
worksheet time series data.
My book, Data Analysis Using Microsoft Excel: Updated for Office XP, has
step-by-step details for exponential smoothing, including using Excel's
Solver to obtain the optimal smoothing constant.
- Mike
www.mikemiddleton.com