Measuring Frequency of Oscillation

mlocsin

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Joined
Nov 11, 2005
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I have data set of some three hundred values measuring a population over time and I want to calculate the frequency of oscillation in its plot—effectively measuring the frequency of boom and bust cycles. Any thoughts on the right function (or series of functions)?
 

Excel Facts

Which lookup functions find a value equal or greater than the lookup value?
MATCH uses -1 to find larger value (lookup table must be sorted ZA). XLOOKUP uses 1 to find values greater and does not need to be sorted.
Hi mlocsin,

Probably the best method mathematically to determine the frequency content of the values is to use the Fourier transform to convert the time series into the frequency domain. I recommend you check out the Fourier Analysis Tool in the Analysis ToolPak.
 
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