FFTEngy:

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   Plot the energy in a signal. 
   Will annotate peaks if y is a 1-dimensional
   array. y may be entered by column or row, but the longest dimension
   will be assumed to be the variation by time.

   Since version 1.
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   Form:
   [e, w] = FFTEngy( y, tSamp, aPeak, noLog )
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   ------
   Inputs
   ------
   y             (:,n) Sequence
   tSamp         (1,1) Sampling period
   aPeak         (1,1) Anotate peaks about this fraction of max
   noLog         (1,1) If input will not use a log plot

   -------
   Outputs
   -------
   e                   Energy
   w                   Frequencies (rad/sec)        

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Children:

Common: Graphics/Plot2D
Math: MathUtils/Odd