.. _pylab_examples-legend_demo2:

pylab_examples example code: legend_demo2.py
============================================



.. plot:: /home/tcaswell/source/p/matplotlib/doc/mpl_examples/pylab_examples/legend_demo2.py

::

    # Make a legend for specific lines.
    import matplotlib.pyplot as plt
    import numpy as np
    
    
    t1 = np.arange(0.0, 2.0, 0.1)
    t2 = np.arange(0.0, 2.0, 0.01)
    
    # note that plot returns a list of lines.  The "l1, = plot" usage
    # extracts the first element of the list into l1 using tuple
    # unpacking.  So l1 is a Line2D instance, not a sequence of lines
    l1, = plt.plot(t2, np.exp(-t2))
    l2, l3 = plt.plot(t2, np.sin(2 * np.pi * t2), '--o', t1, np.log(1 + t1), '.')
    l4, = plt.plot(t2, np.exp(-t2) * np.sin(2 * np.pi * t2), 's-.')
    
    plt.legend((l2, l4), ('oscillatory', 'damped'), loc='upper right', shadow=True)
    plt.xlabel('time')
    plt.ylabel('volts')
    plt.title('Damped oscillation')
    plt.show()
    

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