How to Eliminate White Space on the X-Axis in Matplotlib Plots?

Eliminating White Space on the X-Axis in Matplotlib Plots

In matplotlib, there is an automatic margin set at the edges of the plot to ensure that the data fits nicely within the axis spines. This margin can be desirable on the y-axis, but in some cases, it may be preferred to remove it on the x-axis.

Solution Using plt.margins()

To set the margin to 0 on the x-axis, use the following code:

plt.margins(x=0)  # Context-dependent syntax
ax.margins(x=0)  # Explicitly set margin on specified axis

Alternatively, to remove the margin on both axes throughout the script, use:

plt.rcParams['axes.xmargin'] = 0
plt.rcParams['axes.ymargin'] = 0

For a permanent solution, modify the matplotlib rc file:

axes.xmargin : 0
axes.ymargin : 0

Example Using Seaborn

import seaborn as sns
import matplotlib.pyplot as plt

sns.load_dataset('tips').plot(ax=ax1, title='Default Margin')
sns.load_dataset('tips').plot(ax=ax2, title='Margins: x=0')
ax2.margins(x=0)

Solution Using plt.xlim()

Alternatively, you can manually set the limits of the axes using plt.xlim():

plt.xlim(min(dates), max(dates))  # Set x-axis limits to remove white space

This will adjust the plot to eliminate any white space between the start and end of the x-axis.

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