title: Request for help numpy array syntax
body: <p>I am using a template-script to learn data analysis in using numpy and I don't understand this syntax. There exist two arrays <code>dist_data</code> and <code>dataArray</code>, <code>l</code> is a loop-dummy-variable (as in <code>for l in range(0,k):</code>)and I don't understand the content, specifically the purpose of separation by <code>,</code> in the second parenthesis <code>[l, self.dataArray.shape[1]-1]</code> because I am assuming that it represented a column of <code>dist_data</code></p>
  
  <p><code>dist_data[dist_data[:,-1].argsort()][l, self.dataArray.shape[1]-1]</code></p>