public static void trainModel(Instances dataTrain, Instances dataTest) {
    try {
      LibLINEAR classifier = new LibLINEAR();
      classifier.setBias(10);

      classifier.buildClassifier(dataTrain);

      Evaluation eval = new Evaluation(dataTrain);
      eval.evaluateModel(classifier, dataTest);

      System.out.println(eval.toSummaryString("\nResults\n======\n", false));

    } catch (Exception e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
  }