Module « scipy.spatial.distance »

Fonction sqeuclidean - module scipy.spatial.distance

Signature de la fonction sqeuclidean

def sqeuclidean(u, v, w=None) 

Description

sqeuclidean.__doc__

    Compute the squared Euclidean distance between two 1-D arrays.

    The squared Euclidean distance between `u` and `v` is defined as

    .. math::

       {||u-v||}_2^2

       \left(\sum{(w_i |(u_i - v_i)|^2)}\right)

    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
    -------
    sqeuclidean : double
        The squared Euclidean distance between vectors `u` and `v`.

    Examples
    --------
    >>> from scipy.spatial import distance
    >>> distance.sqeuclidean([1, 0, 0], [0, 1, 0])
    2.0
    >>> distance.sqeuclidean([1, 1, 0], [0, 1, 0])
    1.0