Module « scipy.signal »

Fonction ricker - module scipy.signal

Signature de la fonction ricker

def ricker(points, a) 

Description

ricker.__doc__

    Return a Ricker wavelet, also known as the "Mexican hat wavelet".

    It models the function:

        ``A * (1 - (x/a)**2) * exp(-0.5*(x/a)**2)``,

    where ``A = 2/(sqrt(3*a)*(pi**0.25))``.

    Parameters
    ----------
    points : int
        Number of points in `vector`.
        Will be centered around 0.
    a : scalar
        Width parameter of the wavelet.

    Returns
    -------
    vector : (N,) ndarray
        Array of length `points` in shape of ricker curve.

    Examples
    --------
    >>> from scipy import signal
    >>> import matplotlib.pyplot as plt

    >>> points = 100
    >>> a = 4.0
    >>> vec2 = signal.ricker(points, a)
    >>> print(len(vec2))
    100
    >>> plt.plot(vec2)
    >>> plt.show()