title: 2-dimensional binning with Pandas
body: <p>So I have two sets of features that I wish to bin (classify) and then combine to create a new feature. It is not unlike classifying coordinates into grids on a map.</p>
  
  <p>The issue is that the features are not evenly distributed and I would like to use quantiles when binning (like with <code>pandas.qcut()</code>) on both features/coordinates.</p>
  
  <p>Is there a better way than doing <code>qcut()</code> on both features and then concatenating the result labels?</p>