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# Custom Ticker1

The new ticker code was designed to explicitly support user customized ticking. The documentation http://matplotlib.org/matplotlib.ticker.html details this process. That code defines a lot of preset tickers but was primarily designed to be user extensible.

In this example a user defined function is used to format the ticks in millions of dollars on the y axis

    from matplotlib.ticker import FuncFormatter
    import matplotlib.pyplot as plt
    import numpy as np

    x = np.arange(4)
    money = [1.5e5, 2.5e6, 5.5e6, 2.0e7]

    def millions(x, pos):
        'The two args are the value and tick position'
        return '$%1.1fM' % (x*1e-6)

    formatter = FuncFormatter(millions)

    fig, ax = plt.subplots()
    ax.yaxis.set_major_formatter(formatter)
    plt.bar(x, money)
    plt.xticks(x, ('Bill', 'Fred', 'Mary', 'Sue'))
    plt.show()

Total running time of the script: ( 0 minutes 0.025 seconds)

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