edu.stanford.nlp.util.logging.Redwood Java Examples

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Example #1

Source File: IntelKBPStatisticalExtractor.java From InformationExtraction with GNU General Public License v3.0

5 votes

public static void trainModel() throws IOException {
    forceTrack("Training data");
    List<Pair<KBPInput, String>> trainExamples = DatasetUtils.readDataset(TRAIN_FILE);
    log.info("Read " + trainExamples.size() + " examples");
    log.info("" + trainExamples.stream().map(Pair::second).filter(NO_RELATION::equals).count() + " are " + NO_RELATION);
    endTrack("Training data");

    // Featurize + create the dataset
    forceTrack("Creating dataset");
    RVFDataset<String, String> dataset = new RVFDataset<>();
    final AtomicInteger i = new AtomicInteger(0);
    long beginTime = System.currentTimeMillis();
    trainExamples.stream().parallel().forEach(example -> {
        if (i.incrementAndGet() % 1000 == 0) {
            log.info("[" + Redwood.formatTimeDifference(System.currentTimeMillis() - beginTime) +
                    "] Featurized " + i.get() + " / " + trainExamples.size() + " examples");
        }
        Counter<String> features = features(example.first);  // This takes a while per example
        synchronized (dataset) {
            dataset.add(new RVFDatum<>(features, example.second));
        }
    });
    trainExamples.clear();  // Free up some memory
    endTrack("Creating dataset");

    // Train the classifier
    log.info("Training classifier:");
    Classifier<String, String> classifier = trainMultinomialClassifier(dataset, FEATURE_THRESHOLD, SIGMA);
    dataset.clear();  // Free up some memory

    // Save the classifier
    IOUtils.writeObjectToFile(new IntelKBPStatisticalExtractor(classifier), MODEL_FILE);
}