normalization

      System.out.println("===DATA===");
      System.out.println(trainData);
      System.out.println(testData);

      //Normalize data, including labels (fitLabel=true)
      NormalizerMinMaxScaler normalizer = new NormalizerMinMaxScaler(0, 1);
      normalizer.fitLabel(true);
      normalizer.fit(trainData);

      normalizer.transform(trainData);
      normalizer.transform(testData);

      System.out.println("===Normalized===");
      System.out.println(trainData);
      System.out.println(testData);