public Tuple3<Double, Double, Double> call(String line) {

          String[] parts = line.split(",");

          return new Tuple3<>(new Double(parts[0]), new Double(parts[1]), 1.0);

        }

      }

    );



    JavaRDD<Tuple3<Double, Double, Double>>[] splits = parsedData.randomSplit(new double[]{0.6, 0.4}, 11L);

    JavaRDD<Tuple3<Double, Double, Double>> training = splits[0];

    JavaRDD<Tuple3<Double, Double, Double>> test = splits[1];



    final IsotonicRegressionModel model = new IsotonicRegression().setIsotonic(true).run(training);



    JavaPairRDD<Double, Double> predictionAndLabel = test.mapToPair(

      new PairFunction<Tuple3<Double, Double, Double>, Double, Double>() {