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python-matplotlibHow to add second Y axis


import matplotlib.pyplot as plt

fig, ax = plt.subplots()
twin = ax.twinx()

p1, = ax.plot([0, 1, 2], "g-")
p2, = twin.plot([1, 7, 5], "r-")

ax.set_xlim(0, 2)
ax.set_ylim(0, 3)
twin.set_ylim(0, 8)

ax.tick_params(axis='y', colors=p1.get_color())
twin.tick_params(axis='y', colors=p2.get_color())

plt.show()ctrl + c
import matplotlib.pyplot as plt

loads Matplotlib module to use plotting capabilities

.subplots(

creates set of charts on a single chart area

twinx()

creates twin axes sharing x axis

ax.plot(

plot first line (green one)

twin.plot(

plot second line (red one)

.set_xlim(

set x axis range

.set_ylim(

set y axis range

.show()

render chart in a separate window


How to add second Y axis, python matplotlib

Usage example

import matplotlib.pyplot as plt

fig, ax = plt.subplots()
twin = ax.twinx()

p1, = ax.plot([0, 1, 2], "g-")
p2, = twin.plot([1, 7, 5], "r-")

ax.set_xlim(0, 2)
ax.set_ylim(0, 3)
twin.set_ylim(0, 8)

ax.tick_params(axis='y', colors=p1.get_color())
twin.tick_params(axis='y', colors=p2.get_color())

plt.show()