Posted: March 3rd, 2017
Datasets: http://stp.lingfil.uu.se/~santinim/ml/2015/datasets 1. Start Weka. Launch the explorer window and select the “Preprocess” tab. Open the iris dataset. Select the Classify tab. Under Classifier, select J48. What main parameters can be specified for the classifier? 2. Under Test options, select Crossvalidation and under More options, check Output predictions. Click Start to start training the model. You should see a stream of output appear in the window named Classifier output. What do each of the following sections tell you about the model? a. Predictions on … b. Summary c. Detailed accuracy by class d. Confusion matrix 3. Go to the graphical representation of the decision tree. It can be displayed graphically in a pop-up tree visualizer (Right-click on the item in the Result list.
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