title: Dividing Histograms in Pandas
body: <p>I am reading in a csv file through pandas, and making simple histograms as follows:</p>
  
  <pre><code>df = pd.read_csv(sys.argv[1],header=0)
  hFare = df['Fare'].dropna().hist(bins=[0,10,20,30,45,60,75,100,600],label = "All")
  hSurFare = df[df.Survived==1]['Fare'].dropna().hist(bins=[0,10,20,30,45,60,75,100,600],label="Survivors")
  </code></pre>
  
  <p>What I would like is to have a bin by bin ratio of the two histograms.  Is there an easy way to do this?</p>