title: Time-series boxplot in pandas
body: <p>How can I create a boxplot for a pandas time-series where I have a box for each day?</p>
  
  <p>Sample dataset of hourly data where one box should consist of 24 values:</p>
  
  <pre><code>import pandas as pd
  n = 480
  ts = pd.Series(randn(n),
                 index=pd.date_range(start="2014-02-01",
                                     periods=n,
                                     freq="H"))
  ts.plot()
  </code></pre>
  
  <p>I am aware that I could make an extra column for the day, but I would like to have proper x-axis labeling and x-limit functionality (like in <code>ts.plot()</code>), so being able to work with the datetime index would be great.</p>
  
  <p>There is a similar question for R/ggplot2 <a href="https://stackoverflow.com/questions/22389553/how-to-make-a-timeseries-boxplot-in-r">here</a>, if it helps to clarify what I want.</p>