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"""
==================
Parasite Axes demo
==================
Create a parasite Axes. Such Axes would share the x scale with a host Axes,
but show a different scale in y direction.
This approach uses `mpl_toolkits.axes_grid1.parasite_axes.HostAxes` and
`mpl_toolkits.axes_grid1.parasite_axes.ParasiteAxes`.
The standard and recommended approach is to use instead standard Matplotlib
axes, as shown in the :doc:`/gallery/spines/multiple_yaxis_with_spines`
example.
An alternative approach using `mpl_toolkits.axes_grid1` and
`mpl_toolkits.axisartist` is shown in the
:doc:`/gallery/axisartist/demo_parasite_axes2` example.
"""
import matplotlib.pyplot as plt
from mpl_toolkits.axisartist.parasite_axes import HostAxes
fig = plt.figure()
host = fig.add_axes([0.15, 0.1, 0.65, 0.8], axes_class=HostAxes)
par1 = host.get_aux_axes(viewlim_mode=None, sharex=host)
par2 = host.get_aux_axes(viewlim_mode=None, sharex=host)
host.axis["right"].set_visible(False)
par1.axis["right"].set_visible(True)
par1.axis["right"].major_ticklabels.set_visible(True)
par1.axis["right"].label.set_visible(True)
par2.axis["right2"] = par2.new_fixed_axis(loc="right", offset=(60, 0))
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")
host.set(xlim=(0, 2), ylim=(0, 2), xlabel="Distance", ylabel="Density")
par1.set(ylim=(0, 4), ylabel="Temperature")
par2.set(ylim=(1, 65), ylabel="Velocity")
host.legend()
host.axis["left"].label.set_color(p1.get_color())
par1.axis["right"].label.set_color(p2.get_color())
par2.axis["right2"].label.set_color(p3.get_color())
plt.show()
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