public void doTraining() throws IOException {
readTrainingSentences(examplesFilename);
constructLabelVocab();
extractFeatures();
model.lockdownAfterFeatureExtraction();
if (modelLoadFilename != null) {
readWarmStartModel();
}
optimizationLoop();
model.saveModelAsText(modelSaveFilename);
}
public void optimizationLoop() {
OWLQN minimizer = new OWLQN();
minimizer.setMaxIters(maxIter);
minimizer.setQuiet(false);
minimizer.setWeightsPrinting(new MyWeightsPrinter());
double[] initialWeights = model.convertCoefsToFlat();
double[] finalWeights =
minimizer.minimize(new GradientCalculator(), initialWeights, l1penalty, tol, 5);
model.setCoefsFromFlat(finalWeights);
}
public void constructLabelVocab() {
for (Sentence s : lSentences) {
for (String l : s.labels) {
model.labelVocab.num(l);
}
}
model.labelVocab.lock();
model.numLabels = model.labelVocab.size();
}
public void readWarmStartModel() throws IOException {
assert model.featureVocab.isLocked();
Model warmModel = Model.loadModelFromText(modelLoadFilename);
Model.copyCoefsForIntersectingFeatures(warmModel, model);
}
