.. _pylab_examples-custom_ticker1:

pylab_examples example code: custom_ticker1.py
==============================================



.. plot:: /home/tcaswell/source/p/matplotlib/doc/mpl_examples/pylab_examples/custom_ticker1.py

::

    """
    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()
    

Keywords: python, matplotlib, pylab, example, codex (see :ref:`how-to-search-examples`)