Note
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errorbar(x, y, yerr, xerr)#
Plot y versus x as lines and/or markers with attached errorbars.
See errorbar.

import matplotlib.pyplot as plt import numpy as np plt.style.use('_mpl-gallery') # make data: np.random.seed(1) x = [2, 4, 6] y = [3.6, 5, 4.2] yerr = [0.9, 1.2, 0.5] # plot: fig, ax = plt.subplots() ax.errorbar(x, y, yerr, fmt='o', linewidth=2, capsize=6) ax.set(xlim=(0, 8), xticks=np.arange(1, 8), ylim=(0, 8), yticks=np.arange(1, 8)) plt.show()