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# Masked Demo

Plot lines with points masked out.

This would typically be used with gappy data, to break the line at the data gaps.

    import matplotlib.pyplot as plt
    import numpy as np

    x = np.arange(0, 2*np.pi, 0.02)
    y = np.sin(x)
    y1 = np.sin(2*x)
    y2 = np.sin(3*x)
    ym1 = np.ma.masked_where(y1 > 0.5, y1)
    ym2 = np.ma.masked_where(y2 < -0.5, y2)

    lines = plt.plot(x, y, x, ym1, x, ym2, 'o')
    plt.setp(lines[0], linewidth=4)
    plt.setp(lines[1], linewidth=2)
    plt.setp(lines[2], markersize=10)

    plt.legend(('No mask', 'Masked if > 0.5', 'Masked if < -0.5'),
               loc='upper right')
    plt.title('Masked line demo')
    plt.show()

Total running time of the script: ( 0 minutes 0.165 seconds)

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