var pipeline = mlContext.Transforms.Concatenate("Features", "Age", "Sex", "Cp", "TrestBps", "Chol", "Fbs",
          "RestEcg", "Thalac", "Exang", "OldPeak", "Slope", "Ca", "Thal")
      .Append(mlContext.BinaryClassification.Trainers.FastTree());