public void train(List<Tree<String>> trainTrees) {
lexicon = new Lexicon(trainTrees);
knownParses = new CounterMap<List<String>, Tree<String>>();
spanToCategories = new CounterMap<Integer, String>();
for (Tree<String> trainTree : trainTrees) {
List<String> tags = trainTree.getPreTerminalYield();
knownParses.incrementCount(tags, trainTree, 1.0);
tallySpans(trainTree, 0);
}
}
/* Builds a lexicon from the observed tags in a list of training trees. */
public Lexicon(List<Tree<String>> trainTrees) {
for (Tree<String> trainTree : trainTrees) {
List<String> words = trainTree.getYield();
List<String> tags = trainTree.getPreTerminalYield();
for (int position = 0; position < words.size(); position++) {
String word = words.get(position);
String tag = tags.get(position);
tallyTagging(word, tag);
}
}
}