public void train(List<LabeledLocalTrigramContext> labeledLocalTrigramContexts) {
// collect word-tag counts
for (LabeledLocalTrigramContext labeledLocalTrigramContext : labeledLocalTrigramContexts) {
String word = labeledLocalTrigramContext.getCurrentWord();
String tag = labeledLocalTrigramContext.getCurrentTag();
if (!wordsToTags.keySet().contains(word)) {
// word is currently unknown, so tally its tag in the unknown tag counter
unknownWordTags.incrementCount(tag, 1.0);
}
wordsToTags.incrementCount(word, tag, 1.0);
seenTagTrigrams.add(
makeTrigramString(
labeledLocalTrigramContext.getPreviousPreviousTag(),
labeledLocalTrigramContext.getPreviousTag(),
labeledLocalTrigramContext.getCurrentTag()));
}
wordsToTags = Counters.conditionalNormalize(wordsToTags);
unknownWordTags = Counters.normalize(unknownWordTags);
}
