title: Creating a numpy arange from min and max values of a pandas dframe
body: <p>i wanted to create a numpy arange with min and max values from a pandas series, but since the min and max values are Series objects numpy is giving out the value error</p>
  
  <p>ValueError: The truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all().</p>
  
  <p>This is what im trying</p>
  
  <pre><code>minx = np.min(x_test)
  maxx = np.max(x_test)
  
  np.arange(minx,maxx,0.1)
  </code></pre>
  
  <p>Kindly help</p>