.. _axes_grid-demo_parasite_axes2:

axes_grid example code: demo_parasite_axes2.py
==============================================



.. plot:: /build/matplotlib-2.0.0+dfsg1/doc/mpl_examples/axes_grid/demo_parasite_axes2.py

::

    """
    Parasite axis demo
    
    The following code is an example of a parasite axis. It aims to show a user how
    to plot multiple different values onto one single plot. Notice how in this
    example, par1 and par2 are both calling twinx meaning both are tied directly to
    the x-axis. From there, each of those two axis can behave separately from the
    each other, meaning they can take on separate values from themselves as well as
    the x-axis.
    """
    from mpl_toolkits.axes_grid1 import host_subplot
    import mpl_toolkits.axisartist as AA
    import matplotlib.pyplot as plt
    
    host = host_subplot(111, axes_class=AA.Axes)
    plt.subplots_adjust(right=0.75)
    
    par1 = host.twinx()
    par2 = host.twinx()
    
    offset = 60
    new_fixed_axis = par2.get_grid_helper().new_fixed_axis
    par2.axis["right"] = new_fixed_axis(loc="right",
                                        axes=par2,
                                        offset=(offset, 0))
    
    par2.axis["right"].toggle(all=True)
    
    host.set_xlim(0, 2)
    host.set_ylim(0, 2)
    
    host.set_xlabel("Distance")
    host.set_ylabel("Density")
    par1.set_ylabel("Temperature")
    par2.set_ylabel("Velocity")
    
    p1, = host.plot([0, 1, 2], [0, 1, 2], label="Density")
    p2, = par1.plot([0, 1, 2], [0, 3, 2], label="Temperature")
    p3, = par2.plot([0, 1, 2], [50, 30, 15], label="Velocity")
    
    par1.set_ylim(0, 4)
    par2.set_ylim(1, 65)
    
    host.legend()
    
    host.axis["left"].label.set_color(p1.get_color())
    par1.axis["right"].label.set_color(p2.get_color())
    par2.axis["right"].label.set_color(p3.get_color())
    
    plt.draw()
    plt.show()
    

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