Matplotlib
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Plotting two lines with different y axis in Matplotlib
schedule Aug 11, 2023
Last updated local_offer
Tags Python●Matplotlib
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We can plot two lines with different y axis in Matplotlib using the twinx() method.
Example
To plot two sets of y values y1 and y2 on the same x-axis:
import matplotlib.pyplot as plt
fig, ax = plt.subplots()
x = [1,2,3]y1 = [1,2,3]y2 = [110,110,110]
ax.plot(x, y1, color="blue") # set line color to blueax.set_xlabel('X Axis')ax.set_ylabel('Y1 Axis', color="blue") # set y axis title to blueax.tick_params(axis='y', colors="blue") # set y axis tick labels to blue
# We create another axis object. It shares the same x axis as ax, but the y-axis is separate.ax2 = ax.twinx()ax2.plot(x, y2, color="red") # set line color to redax2.set_ylabel('Y2 Axis', color="red") # set y axis title to redax2.tick_params(axis='y', colors="red") # set y axis tick labels to red
plt.show()
The output is as follows:
Published by Arthur Yanagisawa
Edited by 0 others
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