Module « scipy.fft »

Fonction fhtoffset - module scipy.fft

Signature de la fonction fhtoffset

def fhtoffset(dln, mu, initial=0.0, bias=0.0) 

Description

fhtoffset.__doc__

Return optimal offset for a fast Hankel transform.

    Returns an offset close to `initial` that fulfils the low-ringing
    condition of [1]_ for the fast Hankel transform `fht` with logarithmic
    spacing `dln`, order `mu` and bias `bias`.

    Parameters
    ----------
    dln : float
        Uniform logarithmic spacing of the transform.
    mu : float
        Order of the Hankel transform, any positive or negative real number.
    initial : float, optional
        Initial value for the offset. Returns the closest value that fulfils
        the low-ringing condition.
    bias : float, optional
        Exponent of power law bias, any positive or negative real number.

    Returns
    -------
    offset : float
        Optimal offset of the uniform logarithmic spacing of the transform that
        fulfils a low-ringing condition.

    See also
    --------
    fht : Definition of the fast Hankel transform.

    References
    ----------
    .. [1] Hamilton A. J. S., 2000, MNRAS, 312, 257 (astro-ph/9905191)