Return the radius of a sphere in an arbitrary number of dimensions.

    Parameters
    ----------
    V: array-like
        Volume.
    n: array-like
        The number of dimensions of the space in which the sphere lives.

    Returns
    -------
    R: array-like
        Radius.

def sphere_radius(V, n):
    """Return the radius of a sphere in an arbitrary number of dimensions.

    Parameters
    ----------
    V: array-like
        Volume.
    n: array-like
        The number of dimensions of the space in which the sphere lives.

    Returns
    -------
    R: array-like
        Radius.
    """
    return (((scipy.special.gamma(n / 2.0 + 1.0) * V) ** (1.0 / n)) /
            np.sqrt(np.pi))