Window functions

Various windows

`bartlett`(M)	Return the Bartlett window.
`blackman`(M)	Return the Blackman window.
`hamming`(M)	Return the Hamming window.
`hanning`(M)	Return the Hanning window.
`kaiser`(M, beta)	Return the Kaiser window.

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https://numpy.org/doc/1.23/reference/routines.window.html