Revize 0d31f7e0

Re #8953 tests

Server/ServerApp/Predictor/NaiveBayesClassifier.cs

@@ -5 +5 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Reflection;
+using log4net;
 using Microsoft.ML;
 
 namespace ServerApp.Predictor
@@ -14 +16 @@
     /// </summary>
     class NaiveBayesClassifier : IPredictor
     {
+        private static readonly ILog _log = LogManager.GetLogger(typeof(NaiveBayesClassifier));
+
         /// <summary>
         /// Context of the ML.NET framework.
         /// </summary>
@@ -49 +53 @@
                 .Append(_mlContext.Transforms.Conversion.MapKeyToValue(nameof(ModelOutput.PredictedLabel)));
 
             var cvResults = _mlContext.MulticlassClassification.CrossValidate(this._trainingDataView, pipeline);
-            foreach (var result in cvResults)
-            {
-                var testMetrics = result.Metrics;
-                Console.WriteLine($"*************************************************************************************************************");
-                Console.WriteLine($"*       Metrics for Multi-class Classification model - Model #{result.Fold}    ");
-                Console.WriteLine($"*------------------------------------------------------------------------------------------------------------");
-                Console.WriteLine($"*       MicroAccuracy:    {testMetrics.MicroAccuracy:0.###}");
-                Console.WriteLine($"*       MacroAccuracy:    {testMetrics.MacroAccuracy:0.###}");
-                Console.WriteLine($"*       LogLoss:          {testMetrics.LogLoss:#.###}");
-                Console.WriteLine($"*       LogLossReduction: {testMetrics.LogLossReduction:#.###}");
-                Console.WriteLine($"*       Confusion Matrix: {testMetrics.ConfusionMatrix.GetFormattedConfusionTable()}");
-                Console.WriteLine($"*************************************************************************************************************");
-            }
+            _log.Debug("Cross-validated the trained model");
             this._trainedModel = cvResults.OrderByDescending(fold => fold.Metrics.MicroAccuracy).Select(fold => fold.Model).First();
-            Console.WriteLine($"Selected the model #{cvResults.OrderByDescending(fold => fold.Metrics.MicroAccuracy).Select(fold => fold.Fold).First()} as the best.");
+            _log.Info($"Selected the model #{cvResults.OrderByDescending(fold => fold.Metrics.MicroAccuracy).Select(fold => fold.Fold).First()} as the best.");
             this._predictionEngine = _mlContext.Model.CreatePredictionEngine<ModelInput, ModelOutput>(this._trainedModel);
 
         }
 
         public string Predict(ModelInput input)
         {
+            _log.Debug($"Predicting for input: {input}");
             return this._predictionEngine.Predict(input).PredictedLabel;
         }