.. _pylab_examples-vline_hline_demo:

pylab_examples example code: vline_hline_demo.py
================================================



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

::

    """
    Small demonstration of the hlines and vlines plots.
    """
    
    import matplotlib.pyplot as plt
    import numpy as np
    import numpy.random as rnd
    
    
    def f(t):
        s1 = np.sin(2 * np.pi * t)
        e1 = np.exp(-t)
        return np.absolute((s1 * e1)) + .05
    
    t = np.arange(0.0, 5.0, 0.1)
    s = f(t)
    nse = rnd.normal(0.0, 0.3, t.shape) * s
    
    fig = plt.figure(figsize=(12, 6))
    vax = fig.add_subplot(121)
    hax = fig.add_subplot(122)
    
    vax.plot(t, s + nse, 'b^')
    vax.vlines(t, [0], s)
    vax.set_xlabel('time (s)')
    vax.set_title('Vertical lines demo')
    
    hax.plot(s + nse, t, 'b^')
    hax.hlines(t, [0], s, lw=2)
    hax.set_xlabel('time (s)')
    hax.set_title('Horizontal lines demo')
    
    plt.show()
    

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