title: How to flip y axis in a bar3d() plot?
body: <p>I use <code>bar3d()</code> to plot a 3D barchart, and I'd like to flip the <code>y</code> axis. I've tried to use <code>invert_yaxis()</code>, but it seems effectless. I've also tried manually reverse the values in the list with <code>[::-1]</code>, but it didn't help either. It keeps displaying the 3D barchart in the very same way.</p>
  
  <p>Any idea how can I flip the <code>y</code> axis?</p>
  
  <p>Here's an example how it's <em>not</em> working for me (not even with 3D line plots):</p>
  
  <pre><code>from matplotlib.pyplot import *
  from mpl_toolkits.mplot3d.axes3d import Axes3D
  
  fig1 = figure(1)
  
  ax11 = subplot(2, 2, 1, projection='3d')
  ax11.plot([1, 2, 3, 4], [1, 2, 3, 4])
  
  ax12 = subplot(2, 2, 2, projection='3d')
  ax12.invert_xaxis()
  ax12.plot([1, 2, 3, 4], [1, 2, 3, 4])
  
  ax21 = subplot(2, 2, 3)
  ax21.plot([1, 2, 3, 4])
  
  ax22 = subplot(2, 2, 4)
  ax22.invert_xaxis()
  ax22.plot([1, 2, 3, 4])
  
  show()
  </code></pre>
  
  <p>And the plot looks like this: <a href="http://we.tl/cqSsecVy6P" rel="nofollow">http://we.tl/cqSsecVy6P</a></p>
  
  <p>Thanks,
  Daniel</p>