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"""
=================
Errorbar function
=================
This exhibits the most basic use of the error bar method.
In this case, constant values are provided for the error
in both the x- and y-directions.
"""
import matplotlib.pyplot as plt
import numpy as np
# example data
x = np.arange(0.1, 4, 0.5)
y = np.exp(-x)
fig, ax = plt.subplots()
ax.errorbar(x, y, xerr=0.2, yerr=0.4)
plt.show()
# %%
#
# .. admonition:: References
#
# The use of the following functions, methods, classes and modules is shown
# in this example:
#
# - `matplotlib.axes.Axes.errorbar` / `matplotlib.pyplot.errorbar`