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# Color By y-value

Use masked arrays to plot a line with different colors by y-value.

    import numpy as np
    import matplotlib.pyplot as plt

    t = np.arange(0.0, 2.0, 0.01)
    s = np.sin(2 * np.pi * t)

    upper = 0.77
    lower = -0.77

    supper = np.ma.masked_where(s < upper, s)
    slower = np.ma.masked_where(s > lower, s)
    smiddle = np.ma.masked_where(np.logical_or(s < lower, s > upper), s)

    fig, ax = plt.subplots()
    ax.plot(t, smiddle, t, slower, t, supper)
    plt.show()

Total running time of the script: ( 0 minutes 0.035 seconds)

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