{{alias}}( re, im )
    Computes the argument of a complex number in radians.

    The argument of a complex number, also known as the phase, is the angle of
    the radius extending from the origin to the complex number plotted in the
    complex plane and the positive real axis.

    Parameters
    ----------
    re: number
        Real component.

    im: number
        Imaginary component.

    Returns
    -------
    phi: number
        Argument.

    Examples
    --------
    > var phi = {{alias}}( 5.0, 3.0 )
    ~0.5404

    See Also
    --------