Return a Ricker wavelet, also known as the “Mexican hat wavelet”.
It models the function:
A (1 - x^2/a^2) exp(-t^2/a^2),
where A = 2/sqrt(3a)pi^1/3.
points : int
Number of points in vector. Default is 10 * a. Will be centered around 0.
a : scalar
Width parameter of the wavelet.
vector : 1-D ndarray
Array of length points in shape of Ricker curve.
Examples
scipy.signal.qmf
scipy.signal.cwt
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