.. _pylab_examples-agg_buffer_to_array:

pylab_examples example code: agg_buffer_to_array.py
===================================================



.. plot:: /home/tcaswell/other_source/matplotlib/doc/mpl_examples/pylab_examples/agg_buffer_to_array.py

::

    import matplotlib.pyplot as plt
    import numpy as np
    
    # make an agg figure
    fig, ax = plt.subplots()
    ax.plot([1,2,3])
    ax.set_title('a simple figure')
    fig.canvas.draw()
    
    # grab the pixel buffer and dump it into a numpy array
    buf = fig.canvas.buffer_rgba()
    l, b, w, h = fig.bbox.bounds
    # The array needs to be copied, because the underlying buffer
    # may be reallocated when the window is resized.
    X = np.frombuffer(buf, np.uint8).copy()
    X.shape = h,w,4
    
    # now display the array X as an Axes in a new figure
    fig2 = plt.figure()
    ax2 = fig2.add_subplot(111, frameon=False)
    ax2.imshow(X)
    plt.show()
    

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