matplotlib.github.com/2.2.0/gallery/api/legend.py at main · matplotlib/matplotlib.github.com · GitHub

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"""

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Legend using pre-defined labels

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Defining legend labels with plots.

"""

import numpy as np

import matplotlib.pyplot as plt

# Make some fake data.

a = b = np.arange(0, 3, .02)

c = np.exp(a)

d = c[::-1]

# Create plots with pre-defined labels.

fig, ax = plt.subplots()

ax.plot(a, c, 'k--', label='Model length')

ax.plot(a, d, 'k:', label='Data length')

ax.plot(a, c + d, 'k', label='Total message length')

legend = ax.legend(loc='upper center', shadow=True, fontsize='x-large')

# Put a nicer background color on the legend.

legend.get_frame().set_facecolor('#00FFCC')

plt.show()

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