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# Legend using pre-defined labels

Notice how the legend labels are defined with the 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()

Total running time of the script: ( 0 minutes 0.039 seconds)

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