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# Axhspan Demo

    import numpy as np
    import matplotlib.pyplot as plt

    t = np.arange(-1, 2, .01)
    s = np.sin(2*np.pi*t)

    plt.plot(t, s)
    # draw a thick red hline at y=0 that spans the xrange
    l = plt.axhline(linewidth=8, color='#d62728')

    # draw a default hline at y=1 that spans the xrange
    l = plt.axhline(y=1)

    # draw a default vline at x=1 that spans the yrange
    l = plt.axvline(x=1)

    # draw a thick blue vline at x=0 that spans the upper quadrant of
    # the yrange
    l = plt.axvline(x=0, ymin=0.75, linewidth=8, color='#1f77b4')

    # draw a default hline at y=.5 that spans the middle half of
    # the axes
    l = plt.axhline(y=.5, xmin=0.25, xmax=0.75)

    p = plt.axhspan(0.25, 0.75, facecolor='0.5', alpha=0.5)

    p = plt.axvspan(1.25, 1.55, facecolor='#2ca02c', alpha=0.5)

    plt.axis([-1, 2, -1, 2])

    plt.show()

Total running time of the script: ( 0 minutes 0.034 seconds)

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