hi, I am new to R using package RWeka.Currently i am using J48 classifier for classification and prediction. My doubt is after building tree using J48, when i use the same for prediction on my test set it gives the predicted class names. How could i calculate accuracy, precision, recall and also obtain laplace smoothing values ?? Regards Priyanka Garg School of Computers & Information Sciences University Of Hyderabad [[alternative HTML version deleted]]