Return a Dolph-Chebyshev window.
M : int
Number of points in the output window. If zero or less, an empty array is returned.
at : float
Attenuation (in dB).
sym : bool, optional
When True, generates a symmetric window, for use in filter design. When False, generates a periodic window, for use in spectral analysis.
w : ndarray
The window, with the maximum value always normalized to 1
Examples
scipy.signal.boxcar
scipy.signal.flattop
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