title: Evaluation & Calculate Top-N Accuracy: Top 1 and Top 5
body: <p>I have come across few (Machine learning-classification problem) journal papers mentioned about evaluate accuracy with Top-N approach. Data was show that Top 1 accuracy = 42.5%, and Top-5 accuracy = 72.5% in the same training, testing condition.
  I wonder how to calculate this percentage of top-1 and top-5?</p>
  
  <p>Can some one show me example and steps to calculate this?   </p>
  
  <p>Thanks</p>