I\'m using a FilteredClassifier.classifyInstance() to classify my instances in weka.
I have 2 classes (true and false) and I have many positives, so I actually need
After you have run the classifier on your data, you can visualize the data by right clicking on the test in the " Result list " There are lots of other funcitons on this right click menu that will allow you to gain scores from weka classifiers.