.. _old_animation-simple_anim_gtk:

old_animation example code: simple_anim_gtk.py
==============================================

[`source code <simple_anim_gtk.py>`_]

::

    """
    A simple example of an animated plot using a gtk backend
    """
    from __future__ import print_function
    import time
    import numpy as np
    import matplotlib
    matplotlib.use('GTKAgg') # do this before importing pylab
    
    import matplotlib.pyplot as plt
    
    fig, ax = plt.subplots()
    
    def animate():
        tstart = time.time()                 # for profiling
        x = np.arange(0, 2*np.pi, 0.01)        # x-array
        line, = ax.plot(x, np.sin(x))
    
        for i in np.arange(1,200):
            line.set_ydata(np.sin(x+i/10.0))  # update the data
            fig.canvas.draw()                         # redraw the canvas
        print('FPS:' , 200/(time.time()-tstart))
        raise SystemExit
    
    import gobject
    print('adding idle')
    gobject.idle_add(animate)
    print('showing')
    plt.show()
    

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