/// <summary> /// Read generic model from file. /// </summary> /// <typeparam name="TInput">Type for incoming data</typeparam> /// <typeparam name="TOutput">Type for output data</typeparam> /// <param name="stream">Stream with model</param> /// <returns>Model</returns> public static Task <PredictionModel <TInput, TOutput> > ReadAsync <TInput, TOutput>(Stream stream) where TInput : class where TOutput : class, new() { if (stream == null) { throw new ArgumentNullException(nameof(stream)); } using (var environment = new TlcEnvironment()) { BatchPredictionEngine <TInput, TOutput> predictor = environment.CreateBatchPredictionEngine <TInput, TOutput>(stream); return(Task.FromResult(new PredictionModel <TInput, TOutput>(predictor, stream))); } }
public void TrainAndPredictSentimentModelWithDirectionInstantiationTest() { var dataPath = GetDataPath(SentimentDataPath); var testDataPath = GetDataPath(SentimentTestPath); using (var env = new TlcEnvironment(seed: 1, conc: 1)) { // Pipeline var loader = new TextLoader(env, new TextLoader.Arguments() { Separator = "tab", HasHeader = true, Column = new[] { new TextLoader.Column() { Name = "Label", Source = new [] { new TextLoader.Range() { Min = 0, Max = 0 } }, Type = DataKind.Num }, new TextLoader.Column() { Name = "SentimentText", Source = new [] { new TextLoader.Range() { Min = 1, Max = 1 } }, Type = DataKind.Text } } }, new MultiFileSource(dataPath)); var trans = TextTransform.Create(env, new TextTransform.Arguments() { Column = new TextTransform.Column { Name = "Features", Source = new[] { "SentimentText" } }, KeepDiacritics = false, KeepPunctuations = false, TextCase = Runtime.TextAnalytics.TextNormalizerTransform.CaseNormalizationMode.Lower, OutputTokens = true, StopWordsRemover = new Runtime.TextAnalytics.PredefinedStopWordsRemoverFactory(), VectorNormalizer = TextTransform.TextNormKind.L2, CharFeatureExtractor = new NgramExtractorTransform.NgramExtractorArguments() { NgramLength = 3, AllLengths = false }, WordFeatureExtractor = new NgramExtractorTransform.NgramExtractorArguments() { NgramLength = 2, AllLengths = true }, }, loader); // Train var trainer = new FastTreeBinaryClassificationTrainer(env, new FastTreeBinaryClassificationTrainer.Arguments() { NumLeaves = 5, NumTrees = 5, MinDocumentsInLeafs = 2 }); var trainRoles = new RoleMappedData(trans, label: "Label", feature: "Features"); var pred = trainer.Train(trainRoles); // Get scorer and evaluate the predictions from test data IDataScorerTransform testDataScorer = GetScorer(env, trans, pred, testDataPath); var metrics = EvaluateBinary(env, testDataScorer); ValidateBinaryMetrics(metrics); // Create prediction engine and test predictions var model = env.CreateBatchPredictionEngine <SentimentData, SentimentPrediction>(testDataScorer); var sentiments = GetTestData(); var predictions = model.Predict(sentiments, false); Assert.Equal(2, predictions.Count()); Assert.True(predictions.ElementAt(0).Sentiment.IsTrue); Assert.True(predictions.ElementAt(1).Sentiment.IsTrue); // Get feature importance based on feature gain during training var summary = ((FeatureWeightsCalibratedPredictor)pred).GetSummaryInKeyValuePairs(trainRoles.Schema); Assert.Equal(1.0, (double)summary[0].Value, 1); } }
public void TrainAndPredictSentimentModelWithDirectionInstantiationTestWithWordEmbedding() { var dataPath = GetDataPath(SentimentDataPath); var testDataPath = GetDataPath(SentimentTestPath); using (var env = new TlcEnvironment(seed: 1, conc: 1)) { // Pipeline var loader = TextLoader.ReadFile(env, new TextLoader.Arguments() { Separator = "tab", HasHeader = true, Column = new[] { new TextLoader.Column("Label", DataKind.Num, 0), new TextLoader.Column("SentimentText", DataKind.Text, 1) } }, new MultiFileSource(dataPath)); var text = TextTransform.Create(env, new TextTransform.Arguments() { Column = new TextTransform.Column { Name = "WordEmbeddings", Source = new[] { "SentimentText" } }, KeepDiacritics = false, KeepPunctuations = false, TextCase = Runtime.TextAnalytics.TextNormalizerTransform.CaseNormalizationMode.Lower, OutputTokens = true, StopWordsRemover = new Runtime.TextAnalytics.PredefinedStopWordsRemoverFactory(), VectorNormalizer = TextTransform.TextNormKind.None, CharFeatureExtractor = null, WordFeatureExtractor = null, }, loader); var trans = new WordEmbeddingsTransform(env, new WordEmbeddingsTransform.Arguments() { Column = new WordEmbeddingsTransform.Column[1] { new WordEmbeddingsTransform.Column { Name = "Features", Source = "WordEmbeddings_TransformedText" } }, ModelKind = WordEmbeddingsTransform.PretrainedModelKind.Sswe, }, text); // Train var trainer = new FastTreeBinaryClassificationTrainer(env, new FastTreeBinaryClassificationTrainer.Arguments() { NumLeaves = 5, NumTrees = 5, MinDocumentsInLeafs = 2 }); var trainRoles = new RoleMappedData(trans, label: "Label", feature: "Features"); var pred = trainer.Train(trainRoles); // Get scorer and evaluate the predictions from test data IDataScorerTransform testDataScorer = GetScorer(env, trans, pred, testDataPath); var metrics = EvaluateBinary(env, testDataScorer); // SSWE is a simple word embedding model + we train on a really small dataset, so metrics are not great. Assert.Equal(.6667, metrics.Accuracy, 4); Assert.Equal(.71, metrics.Auc, 1); Assert.Equal(.58, metrics.Auprc, 2); // Create prediction engine and test predictions var model = env.CreateBatchPredictionEngine <SentimentData, SentimentPrediction>(testDataScorer); var sentiments = GetTestData(); var predictions = model.Predict(sentiments, false); Assert.Equal(2, predictions.Count()); Assert.True(predictions.ElementAt(0).Sentiment.IsTrue); Assert.True(predictions.ElementAt(1).Sentiment.IsTrue); // Get feature importance based on feature gain during training var summary = ((FeatureWeightsCalibratedPredictor)pred).GetSummaryInKeyValuePairs(trainRoles.Schema); Assert.Equal(1.0, (double)summary[0].Value, 1); } }