title: Latex labels with seaborn
body: <p>I'm trying to plot with seaborn.kdeplot with LaTeX labels. What I tried is the following:</p>
  
  <pre><code>import numpy as np
  import matplotlib
  matplotlib.use('Agg')
  import matplotlib.pyplot as plt
  import seaborn as sns
  sns.set(font_scale=1.5, rc={'text.usetex' : True})
  
  x = np.linspace(-50,50,100)
  y = np.sin(x)**2/x
  
  fig = plt.figure(1)
  sns.set_style('white')
  sns.kdeplot(np.array(y), label='hey')
  fig.gca().set(xlabel=r'$e(t_0)$ [s]', ylabel='PDF')
  fig.savefig("seaborntest.png", close = True, verbose = True)
  </code></pre>
  
  <p>Running this I've got the following error:</p>
  
  <pre><code>Traceback (most recent call last):
    File "./sns_problem.py", line 17, in &lt;module&gt;
      fig.savefig("seaborntest.png", close = True, verbose = True)
    File "/usr/lib64/python2.7/site-packages/matplotlib/figure.py", line 1363, in savefig
      self.canvas.print_figure(*args, **kwargs)
    File "/usr/lib64/python2.7/site-packages/matplotlib/backend_bases.py", line 2093, in print_figure
      **kwargs)
    File "/usr/lib64/python2.7/site-packages/matplotlib/backends/backend_agg.py", line 491, in print_png
      FigureCanvasAgg.draw(self)
    File "/usr/lib64/python2.7/site-packages/matplotlib/backends/backend_agg.py", line 439, in draw
      self.figure.draw(self.renderer)
    File "/usr/lib64/python2.7/site-packages/matplotlib/artist.py", line 54, in draw_wrapper
      draw(artist, renderer, *args, **kwargs)
    File "/usr/lib64/python2.7/site-packages/matplotlib/figure.py", line 999, in draw
      func(*args)
    File "/usr/lib64/python2.7/site-packages/matplotlib/artist.py", line 54, in draw_wrapper
      draw(artist, renderer, *args, **kwargs)
    File "/usr/lib64/python2.7/site-packages/matplotlib/axes.py", line 2086, in draw
      a.draw(renderer)
    File "/usr/lib64/python2.7/site-packages/matplotlib/artist.py", line 54, in draw_wrapper
      draw(artist, renderer, *args, **kwargs)
    File "/usr/lib64/python2.7/site-packages/matplotlib/axis.py", line 1050, in draw
      renderer)
    File "/usr/lib64/python2.7/site-packages/matplotlib/axis.py", line 999, in _get_tick_bboxes
      extent = tick.label1.get_window_extent(renderer)
    File "/usr/lib64/python2.7/site-packages/matplotlib/text.py", line 752, in get_window_extent
      bbox, info = self._get_layout(self._renderer)
    File "/usr/lib64/python2.7/site-packages/matplotlib/text.py", line 304, in _get_layout
      ismath=False)
    File "/usr/lib64/python2.7/site-packages/matplotlib/backends/backend_agg.py", line 196, in get_text_width_height_descent
      texmanager = self.get_texmanager()
    File "/usr/lib64/python2.7/site-packages/matplotlib/backend_bases.py", line 597, in get_texmanager
      self._texmanager = TexManager()
    File "/usr/lib64/python2.7/site-packages/matplotlib/texmanager.py", line 137, in __init__
      ff = rcParams['font.family'].lower()
  AttributeError: 'list' object has no attribute 'lower'
  </code></pre>
  
  <p>What could be the problem? The strange thing is that I got this error even if I remove the line adding the labels. What is the proper way of using LaTeX in seaborn plot labels?</p>