Function test_twin_spines

lib/matplotlib/tests/test_axes.py:6197–6238

()

@image_comparison(['twin_spines.png'], remove_text=True, style='_classic_test',
                  tol=0 if platform.machine() == 'x86_64' else 0.022)
def test_twin_spines():

    def make_patch_spines_invisible(ax):
        ax.set_frame_on(True)
        ax.patch.set_visible(False)
        ax.spines[:].set_visible(False)

    fig = plt.figure(figsize=(4, 3))
    fig.subplots_adjust(right=0.75)

    host = fig.add_subplot()
    par1 = host.twinx()
    par2 = host.twinx()

    # Offset the right spine of par2.  The ticks and label have already been
    # placed on the right by twinx above.
    par2.spines.right.set_position(("axes", 1.2))
    # Having been created by twinx, par2 has its frame off, so the line of
    # its detached spine is invisible.  First, activate the frame but make
    # the patch and spines invisible.
    make_patch_spines_invisible(par2)
    # Second, show the right spine.
    par2.spines.right.set_visible(True)

    p1, = host.plot([0, 1, 2], [0, 1, 2], "b-")
    p2, = par1.plot([0, 1, 2], [0, 3, 2], "r-")
    p3, = par2.plot([0, 1, 2], [50, 30, 15], "g-")

    host.set_xlim(0, 2)
    host.set_ylim(0, 2)
    par1.set_ylim(0, 4)
    par2.set_ylim(1, 65)

    host.yaxis.label.set_color(p1.get_color())
    par1.yaxis.label.set_color(p2.get_color())
    par2.yaxis.label.set_color(p3.get_color())

    tkw = dict(size=4, width=1.5)
    host.tick_params(axis='y', colors=p1.get_color(), **tkw)
    par1.tick_params(axis='y', colors=p2.get_color(), **tkw)
    par2.tick_params(axis='y', colors=p3.get_color(), **tkw)
    host.tick_params(axis='x', **tkw)


@image_comparison(['twin_spines_on_top.png', 'twin_spines_on_top.png'],