
{{alias}}( z, delta )
    Computes the ratio of two gamma functions.

    The ratio is defined as: Γ(z) / Γ(z+Δ).

    Parameters
    ----------
    z: number
        First gamma parameter.

    delta: number
        Difference.

    Returns
    -------
    y: number
        Function value.

    Examples
    --------
    > var y = {{alias}}( 2.0, 3.0 )
    ~0.042
    > y = {{alias}}( 4.0, 0.5 )
    ~0.516
    > y = {{alias}}( 100.0, 0.0 )
    1.0
    > y = {{alias}}( NaN, 3.0 )
    NaN
    > y = {{alias}}( 5.0, NaN )
    NaN
    > y = {{alias}}( NaN, NaN )
    NaN

    See Also
    --------

