title: How to identify the details of incorrectly classified instances in Weka GUI?
body: <p>I want to get the details (<em>unique id</em>) of the incorrectly classified instances using Weka GUI. I am following the answers of <a href="https://stackoverflow.com/questions/10646536/finding-out-wrongly-classified-instances-when-using-weka">this question</a>. In that, they ask to use the filter <code>StringToNominal</code> in Preprocessing tab to convert the <em>unique id</em>, which is an string. However, by following that, I doubt if the classifier is considering the <em>unique id</em> column also as a feature during the classification?</p>
  
  <p>Please suggest me the correct way of approaching this.</p>
  
  <p>I happy to provide examples if needed.</p>