.. _pylab_examples-multiple_yaxis_with_spines:

pylab_examples example code: multiple_yaxis_with_spines.py
==========================================================



.. plot:: /home/tcaswell/source/p/matplotlib/doc/mpl_examples/pylab_examples/multiple_yaxis_with_spines.py

::

    import matplotlib.pyplot as plt
    
    
    def make_patch_spines_invisible(ax):
        ax.set_frame_on(True)
        ax.patch.set_visible(False)
        for sp in ax.spines.values():
            sp.set_visible(False)
    
    fig, host = plt.subplots()
    fig.subplots_adjust(right=0.75)
    
    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-", label="Density")
    p2, = par1.plot([0, 1, 2], [0, 3, 2], "r-", label="Temperature")
    p3, = par2.plot([0, 1, 2], [50, 30, 15], "g-", label="Velocity")
    
    host.set_xlim(0, 2)
    host.set_ylim(0, 2)
    par1.set_ylim(0, 4)
    par2.set_ylim(1, 65)
    
    host.set_xlabel("Distance")
    host.set_ylabel("Density")
    par1.set_ylabel("Temperature")
    par2.set_ylabel("Velocity")
    
    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)
    
    lines = [p1, p2, p3]
    
    host.legend(lines, [l.get_label() for l in lines])
    
    plt.show()
    

Keywords: python, matplotlib, pylab, example, codex (see :ref:`how-to-search-examples`)