title: set matplotlib 3d plot aspect ratio
body: <pre><code>import matplotlib.pyplot as plt
  from mpl_toolkits.mplot3d import Axes3D
  </code></pre>
  
  <p>Setting the aspect ratio works for 2d plots:</p>
  
  <pre><code>ax = plt.axes()
  ax.plot([0,1],[0,10])
  ax.set_aspect('equal','box')
  </code></pre>
  
  <p>But does not for 3d:</p>
  
  <pre><code>ax = plt.axes(projection='3d')
  ax.plot([0,1],[0,1],[0,10])
  ax.set_aspect('equal','box')
  </code></pre>
  
  <p>Is there a different syntax for the 3d case, or it's not implemented?</p>