Utility for debugging.

def ellplot (mjr, mnr, pa):
    """Utility for debugging."""
    _ellcheck (mjr, mnr, pa)
    import omega as om

    th = np.linspace (0, 2 * np.pi, 200)
    x, y = ellpoint (mjr, mnr, pa, th)
    return om.quickXY (x, y, 'mjr=%f mnr=%f pa=%f' %
                       (mjr, mnr, pa * 180 / np.pi))