xes`.

        For example if we want to have a second scale for the data plotted on
        the yaxis.

        %(_secax_docstring)s

        Examples
        --------
        Add a secondary Axes that converts from radians to degrees

        .. plot::

            fig, ax = plt.subplots()
            ax.plot(range(1, 360, 5), range(1, 360, 5))
            ax.set_ylabel('degrees')
            secax = ax.secondary_yaxis('right', functions=(np.deg2rad,
                                                           np.rad2deg))
            secax.set_ylabel('radians')
        )