.. _pylab_examples-log_demo:

pylab_examples example code: log_demo.py
========================================



.. plot:: /build/buildd/matplotlib-0.98.5.2/doc/mpl_examples/pylab_examples/log_demo.py

::

    
    import numpy as np
    import matplotlib.pyplot as plt
    
    plt.subplots_adjust(hspace=0.4)
    t = np.arange(0.01, 20.0, 0.01)
    
    # log y axis
    plt.subplot(311)
    plt.semilogy(t, np.exp(-t/5.0))
    plt.ylabel('semilogy')
    plt.grid(True)
    
    # log x axis
    plt.subplot(312)
    plt.semilogx(t, np.sin(2*np.pi*t))
    plt.ylabel('semilogx')
    plt.grid(True)
    
    # log x and y axis
    plt.subplot(313)
    plt.loglog(t, 20*np.exp(-t/10.0), basex=4)
    plt.grid(True)
    plt.ylabel('loglog base 4 on x')
    
    plt.show()
    

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