PeriodogramArray

PeriodogramArray[list] returns the squared magnitude of the discrete Fourier transform (power spectrum) of list.

PeriodogramArray[list,n] averages the power spectra of non-overlapping partitions of length n.

PeriodogramArray[list,n,d] uses partitions with offset d.

PeriodogramArray[list,n,d,wfun] applies a smoothing window wfun to each partition.

PeriodogramArray[list,n,d,wfun,m] pads partitions with zeros to length m prior to the computation of the transform.

PeriodogramArray[image,…] returns the squared power spectrum of image.

PeriodogramArray[audio,…] returns the squared power spectrum of audio.

PeriodogramArray[video,…] returns the squared power spectrum of the first audio track in video.

Examples

Compute the power spectrum of a simple signal:

PeriodogramArray[{1, 2, 3, 4, 5}]
(* {225., 6.88197, 1.11803, 1.11803, 6.88197} *)

Use partitions with averaging:

data = Table[Sin[2 Pi n/10], {n, 100}];
PeriodogramArray[data, 20]

Please visit the official Wolfram Language Reference for more details.