Parameters
    ----------
    c : array_like
        1-D array containing the Chebyshev series coefficients, ordered
        from lowest order term to highest.

    Returns
    -------
    pol : ndarray
        1-D array containing the coefficients of the equivalent polynomial
        (relative to the "standard" basis) ordered from lowest order term
        to highest.

    See Also
    --------
    poly2cheb

    Notes
    -----
    The easy way to do conversions between polynomial basis sets
    is to use the convert method of a class instance.

    Examples
    --------
    >>> from numpy import polynomial as P
    >>> c = P.Chebyshev(range(4))
    >>> c
    Chebyshev([0., 1., 2., 3.], domain=[-1,  1], window=[-1,  1])
    >>> p = c.convert(kind=P.Polynomial)
    >>> p
    Polynomial([-2., -8.,  4., 12.], domain=[-1.,  1.], window=[-1.,  1.])
    >>> P.chebyshev.cheb2poly(range(4))
    array([-2.,  -8.,   4.,  12.])

    r