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How to align the bar and line in Matplotlib two Y-axes chart?
To align the bar and line in matplotlib two Y-axes chart, we can use twinx() method to create a twin of Axes with a shared X-axis but independent Y-axis.
Steps
Set the figure size and adjust the padding between and around the subplots.
Make a Pandas dataframe with columns 1 and 2.
Plot the dataframe using plot() method with kind="bar", i.e., class by name.
Use twinx() method to create a twin of Axes with a shared X-axis but independent Y-axis.
Plot the axis (Step 3) ticks and dataframe columns values to plot the lines.
To display the figure, use show() method.
Example
from matplotlib import pyplot as plt
import pandas as pd
plt.rcParams["figure.figsize"] = [7.50, 3.50]
plt.rcParams["figure.autolayout"] = True
df = pd.DataFrame({"col1": [1, 3, 5, 7, 1], "col2": [1, 5, 7, 9, 1]})
ax = df.plot(kind="bar")
ax2 = ax.twinx()
ax2.plot(ax.get_xticks(),
df[['col1', 'col2']].values,
linestyle='-',
marker='o', linewidth=2.0)
plt.show()Output
Updated on: 03-Jun-2021
2K+ Views
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