Module « scipy.interpolate »

Classe « PPoly »

Informations générales

Héritage

builtins.object
    _PPolyBase
        PPoly

Définition

class PPoly(_PPolyBase):

Description _{[extrait de PPoly.__doc__]}

    Piecewise polynomial in terms of coefficients and breakpoints

    The polynomial between ``x[i]`` and ``x[i + 1]`` is written in the
    local power basis::

        S = sum(c[m, i] * (xp - x[i])**(k-m) for m in range(k+1))

    where ``k`` is the degree of the polynomial.

    Parameters
    ----------
    c : ndarray, shape (k, m, ...)
        Polynomial coefficients, order `k` and `m` intervals.
    x : ndarray, shape (m+1,)
        Polynomial breakpoints. Must be sorted in either increasing or
        decreasing order.
    extrapolate : bool or 'periodic', optional
        If bool, determines whether to extrapolate to out-of-bounds points
        based on first and last intervals, or to return NaNs. If 'periodic',
        periodic extrapolation is used. Default is True.
    axis : int, optional
        Interpolation axis. Default is zero.

    Attributes
    ----------
    x : ndarray
        Breakpoints.
    c : ndarray
        Coefficients of the polynomials. They are reshaped
        to a 3-D array with the last dimension representing
        the trailing dimensions of the original coefficient array.
    axis : int
        Interpolation axis.

    Methods
    -------
    __call__
    derivative
    antiderivative
    integrate
    solve
    roots
    extend
    from_spline
    from_bernstein_basis
    construct_fast

    See also
    --------
    BPoly : piecewise polynomials in the Bernstein basis

    Notes
    -----
    High-order polynomials in the power basis can be numerically
    unstable. Precision problems can start to appear for orders
    larger than 20-30.
    

Liste des attributs statiques

Attributs statiques hérités de la classe _PPolyBase

axis, c, extrapolate, x

Liste des opérateurs

Opérateurs hérités de la classe object

__eq__, __ge__, __gt__, __le__, __lt__, __ne__

Méthodes héritées de la classe _PPolyBase

__call__, __init_subclass__, __subclasshook__, construct_fast, extend

Méthodes héritées de la classe object

__delattr__, __dir__, __format__, __getattribute__, __hash__, __reduce__, __reduce_ex__, __repr__, __setattr__, __sizeof__, __str__