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periodogram

   Also found in: Wikipedia 0.01 sec.
periodogram [‚pir·ē′äd·ə‚gram]
(statistics)
A graph used in harmonic analysis of a series that oscillates, such as a time series consisting potentially of several cycles differing in length; the square of the amplitude or intensity for each curve covering a length of time is plotted against the lengths of the various curves.


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RSA estimates were derived every minute from Welch periodograms applied to the instantaneous IBI series (single epochs, Hamming-windowed) and were the sum of coefficient magnitudes from 0.
It uses wavelet analysis for the spatial series analysis of a sampling instrument where the sample rate/target scale is changing Analysis of the data is considered by using spectrograms (short-distance Fast Fourier Transforms (FFTs) in preference to periodograms and continuous wavelet transforms (CWTs) if possible.
 
 
 
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