title: Plot Pandas DataFrame as Bar and Line on the same one chart
body: <p>I am trying to plot a chart with the 1st and 2nd columns of data as bars and then a line overlay for the 3rd column of data.</p>
  
  <p>I have tried the following code but this creates 2 separate charts but I would like this all on one chart.</p>
  
  <pre><code>left_2013 = pd.DataFrame({'month': ['jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug', 'sep', 'oct', 'nov', 'dec'],
                       '2013_val': [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 9, 6]})
  
  right_2014 = pd.DataFrame({'month': ['jan', 'feb'], '2014_val': [4, 5]})
  
  right_2014_target = pd.DataFrame({'month': ['jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug', 'sep', 'oct', 'nov', 'dec'],
                                     '2014_target_val': [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]})
  
  
  df_13_14 = pd.merge(left_2013, right_2014, how='outer')
  df_13_14_target = pd.merge(df_13_14, right_2014_target, how='outer')
  df_13_14_target[['month','2013_val','2014_val','2014_target_val']].head(12)
  
  plt.figure()
  df_13_14_target[['month','2014_target_val']].plot(x='month',linestyle='-', marker='o')
  df_13_14_target[['month','2013_val','2014_val']].plot(x='month', kind='bar')
  </code></pre>
  
  <p>This is what I currently get</p>
  
  <p><img src="https://i.stack.imgur.com/vKTfr.png" alt="kpi dashboard"></p>