title: How to calculate the AUC value for a ranger RF model?
body: <p>How can I calculate the AUC value for a ranger model ? Ranger is a fast implementation of randomForest algorithm in R. I'm using the following code to build the ranger model for classification purposes, and get the prediction from the model:</p>
  
  <pre><code>#Build the model using ranger() function
  ranger.model &lt;- ranger(formula, data = data_train, importance = 'impurity',   
  write.forest = TRUE, num.trees = 3000, mtry = sqrt(length(currentComb)), 
  classification = TRUE)
  #get the prediction for the ranger model
  pred.data &lt;- predict(ranger.model, dat = data_test,)
  table(pred.data$predictions)
  </code></pre>
  
  <p>But I dont know how to calculate the AUC value</p>
  
  <p>Any idea ?</p>