.. _pylab_examples-axhspan_demo:

pylab_examples example code: axhspan_demo.py
============================================



.. plot:: /builddir/build/BUILD/matplotlib-1.2.0/doc/mpl_examples/pylab_examples/axhspan_demo.py

::

    import numpy as np
    import matplotlib.pyplot as plt
    
    t = np.arange(-1,2, .01)
    s = np.sin(2*np.pi*t)
    
    plt.plot(t,s)
    # draw a thick red hline at y=0 that spans the xrange
    l = plt.axhline(linewidth=4, color='r')
    
    # draw a default hline at y=1 that spans the xrange
    l = plt.axhline(y=1)
    
    # draw a default vline at x=1 that spans the yrange
    l = plt.axvline(x=1)
    
    # draw a thick blue vline at x=0 that spans the upper quadrant of
    # the yrange
    l = plt.axvline(x=0, ymin=0.75, linewidth=4, color='b')
    
    # draw a default hline at y=.5 that spans the the middle half of
    # the axes
    l = plt.axhline(y=.5, xmin=0.25, xmax=0.75)
    
    p = plt.axhspan(0.25, 0.75, facecolor='0.5', alpha=0.5)
    
    p = plt.axvspan(1.25, 1.55, facecolor='g', alpha=0.5)
    
    plt.axis([-1,2,-1,2])
    
    
    plt.show()
    

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