Module « scipy.spatial.distance »

Fonction braycurtis - module scipy.spatial.distance

Signature de la fonction braycurtis

def braycurtis(u, v, w=None) 

Description

braycurtis.__doc__

    Compute the Bray-Curtis distance between two 1-D arrays.

    Bray-Curtis distance is defined as

    .. math::

       \sum{|u_i-v_i|} / \sum{|u_i+v_i|}

    The Bray-Curtis distance is in the range [0, 1] if all coordinates are
    positive, and is undefined if the inputs are of length zero.

    Parameters
    ----------
    u : (N,) array_like
        Input array.
    v : (N,) array_like
        Input array.
    w : (N,) array_like, optional
        The weights for each value in `u` and `v`. Default is None,
        which gives each value a weight of 1.0

    Returns
    -------
    braycurtis : double
        The Bray-Curtis distance between 1-D arrays `u` and `v`.

    Examples
    --------
    >>> from scipy.spatial import distance
    >>> distance.braycurtis([1, 0, 0], [0, 1, 0])
    1.0
    >>> distance.braycurtis([1, 1, 0], [0, 1, 0])
    0.33333333333333331