How to change fill pattern (hatch) of the Confidence Interval in the Seaborn Lineplot function

Question

I have created a simple lineplot with Seaborn using this code:

sns.lineplot(data=data, x='year', y='Value', color='#128094', linewidth=1, estimator=lambda x: x.sum() / 12)

Which produced this:

How could I change the pattern of the Confidence Interval so I get a hatched pattern such as '\\\\\\'?

Answer 1

• Use err_kws from seaborn.lineplot
  • dict of keyword arguments : Additional paramters to control the aesthetics of the error bars. The kwargs are passed either to matplotlib.axes.Axes.fill_between() or matplotlib.axes.Axes.errorbar() , depending on err_style .
  • Specify patterns as desired (eg '\\\\\\\\' ) based on {'/', '\\\\', '|', '-', '+', 'x', 'o', 'O', '.', '*'} specified in the docs (note that \\ is an escape character and needs to be written twice).

import seaborn as sns
import matplotlib.pyplot as plt

flights = sns.load_dataset("flights")

fig, ax = plt.subplots(figsize=(10, 6))
p = sns.lineplot(data=flights, x="year", y="passengers", err_kws={'linestyle': '--', 'hatch': '///', 'fc': 'none'}, ax=ax)