title: Can't handle mix of multiclass and continuous
body: <p>the output has four classes: [0,1,2,3]
  the prediction is continuous number in [0,1] (after using sigmoid function)</p>
  
  <p>I have tried confusion matrix, f1_score in sklearn, but there is an error in both case:</p>
  
  <pre><code>ValueError: Can't handle mix of multiclass and continuous
  </code></pre>
  
  <p>If I reduce it into binary classifier and use AUC to evaluate it, there is no error, which means that AUC can handle continuous inputs.</p>
  
  <p>My question is where can I find an evaluation in sklearn so that not only deal with multi-classes but also handle with contiuous inputs.</p>