title: Multi-line chart with seaborn tsplot
body: <p>I want to create a smoothed line chart using matplotlib and seaborn.</p>
  
  <p>This is my dataframe <code>df</code>:</p>
  
  <pre><code>hour    direction    hourly_avg_count
  0       1            20
  1       1            22
  2       1            21
  3       1            21
  ..      ...          ...
  24      1            15
  0       2            24
  1       2            28
  ...     ...          ...
  </code></pre>
  
  <p>The line chart should contain two lines, one for <code>direction</code> equal to 1, another for <code>direction</code> equal to 2. The X axis is <code>hour</code> and Y axis is <code>hourly_avg_count</code>.</p>
  
  <p>I tried this, but I cannot see the lines.</p>
  
  <pre><code>import pandas as pd
  import seaborn as sns
  import matplotlib
  import matplotlib.pyplot as plt
  
  plt.figure(figsize=(12,8))
  sns.tsplot(df, time='hour', condition='direction', value='hourly_avg_count')
  </code></pre>