.. _units-units_scatter:

units example code: units_scatter.py
====================================



.. plot:: /home/tcaswell/source/p/matplotlib/doc/mpl_examples/units/units_scatter.py

::

    """
    Demonstrate unit handling
    
    basic_units is a mockup of a true units package used for testing
    purposed, which illustrates the basic interface that a units package
    must provide to matplotlib.
    
    The example below shows support for unit conversions over masked
    arrays.
    """
    import numpy as np
    from basic_units import secs, hertz, minutes
    from matplotlib.pylab import figure, show
    
    # create masked array
    
    
    xsecs = secs*np.ma.MaskedArray((1, 2, 3, 4, 5, 6, 7, 8), (1, 0, 1, 0, 0, 0, 1, 0), np.float)
    #xsecs = secs*np.arange(1,10.)
    
    fig = figure()
    ax1 = fig.add_subplot(3, 1, 1)
    ax1.scatter(xsecs, xsecs)
    #ax1.set_ylabel('seconds')
    ax1.axis([0, 10, 0, 10])
    
    ax2 = fig.add_subplot(3, 1, 2, sharex=ax1)
    ax2.scatter(xsecs, xsecs, yunits=hertz)
    ax2.axis([0, 10, 0, 1])
    
    ax3 = fig.add_subplot(3, 1, 3, sharex=ax1)
    ax3.scatter(xsecs, xsecs, yunits=hertz)
    ax3.yaxis.set_units(minutes)
    ax3.axis([0, 10, 0, 1])
    
    show()
    

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