title: Bar graph in subplot2grid
body: <p>I want to have several subplots, two of which showing frames from a video feed, and a third showing computed results as a bar graph.
  After creating a matplotlib figure, I create several subplot2grids, which I then update with FuncAnimation.</p>
  
  <p>The usual way I would create a bar graph (to be updated) is:</p>
  
  <pre><code>fig = plt.figure()
  ax = plt.axes(xlim=(0, 9), ylim=(0, 100))
  rects = plt.bar(res_x, res_y, color='b')
  
  def animate(args):
      ...
      ...
      for rect, yi in zip(rects, results):
          rect.set_height(yi*100)
      return rects
  
  anim = animation.FuncAnimation(fig, animate, frames=200, interval=20, blit=True)
  plt.show()
  </code></pre>
  
  <p>I am now trying to add a bar graph along side the other subplots:</p>
  
  <pre><code>fig = plt.figure()
  plt1 = plt.subplot2grid((2, 2), (0, 0), rowspan=2)
  plt2 = plt.subplot2grid((2, 2), (0, 1))
  
  #Confusion with the following
  bar_plot = plt.subplot2grid((2,2), (1,1))
  ax = plt.axes(xlim=(0, 9), ylim=(0, 100))
  rects = plt.bar(res_x, res_y, color='b')
  
  
  def animate(args):
      ...
      ...
  
      im1 = plt1.imshow(...)
      im2 = plt2.imshow(...)
  
      for rect, yi in zip(rects, results):
          rect.set_height(yi*100)
      return im1, im2, rects
  
  anim = animation.FuncAnimation(fig, animate, frames=200, interval=20, blit=True)
  plt.show()
  </code></pre>
  
  <p>I get the following error: AttributeError: 'BarContainer' object has no attribute 'set_animated'</p>
  
  <p>Any ideas how I can "place" a bar graph as a subplot, and have it update together with other data from subplots?</p>
  
  <p>Thanks!</p>