In the case of Weka's Explorer, is there any way to get the class probabilities of the test instances as classified by a Naive Bayes' classifier?
In Weka Explorer on the Classify tab, click on More options... and tick Output predictions. Then Start the training and testing and the result shows you the probabilities of assigning each class for each test instance.
来源：https://stackoverflow.com/questions/10868233/weka-how-to-get-the-probabilities-of-each-class-for-the-test-instances