title: Putting newline in matplotlib label with TeX in Python?
body: <p>How can I add a newline to a plot's label (e.g. xlabel or ylabel) in matplotlib?  For example,</p>
  
  <pre><code>plt.bar([1, 2], [4, 5])
  plt.xlabel("My x label")
  plt.ylabel(r"My long label with $\Sigma_{C}$ math \n continues here") 
  </code></pre>
  
  <p>Ideally I'd like the y-labeled to be centered too.  Is there a way to do this?  It's important that the label have both TeX (enclosed in '$') and the newline.</p>