public void TestDisambiguation()
{
var fsm = new FsmMorphologicalAnalyzer();
var corpus = new DisambiguationCorpus("../../../penntreebank.txt");
var algorithm = new DummyDisambiguation();
var correctParse = 0;
var correctRoot = 0;
for (var i = 0; i < corpus.SentenceCount(); i++)
{
var sentenceAnalyses = fsm.RobustMorphologicalAnalysis(corpus.GetSentence(i));
var fsmParses = algorithm.Disambiguate(sentenceAnalyses);
for (var j = 0; j < corpus.GetSentence(i).WordCount(); j++)
{
var word = (DisambiguatedWord)corpus.GetSentence(i).GetWord(j);
if (fsmParses[j].TransitionList().Equals(word.GetParse().ToString()))
{
correctParse++;
}
if (fsmParses[j].GetWord().Equals(word.GetParse().GetWord()))
{
correctRoot++;
}
}
}
Assert.AreEqual(0.86, (correctRoot + 0.0) / corpus.NumberOfWords(), 0.01);
Assert.AreEqual(0.70, (correctParse + 0.0) / corpus.NumberOfWords(), 0.01);
}
/**
* <summary> The train method gets sentences from given {@link DisambiguationCorpus} and both word and the next word of that sentence at each iteration.
* Then, adds these words together with their part of speech tags to word unigram and bigram models. It also adds the last inflectional group of
* word to the ig unigram and bigram models.
* <p/>
* At the end, it calculates the NGram probabilities of both word and ig unigram models by using LaplaceSmoothing, and
* both word and ig bigram models by using InterpolatedSmoothing.</summary>
*
* <param name="corpus">{@link DisambiguationCorpus} to train.</param>
*/
public override void Train(DisambiguationCorpus corpus)
{
int i, j;
var words1 = new Word[1];
var igs1 = new Word[1];
var words2 = new Word[2];
var igs2 = new Word[2];
wordUniGramModel = new NGram <Word>(1);
igUniGramModel = new NGram <Word>(1);
wordBiGramModel = new NGram <Word>(2);
igBiGramModel = new NGram <Word>(2);
for (i = 0; i < corpus.SentenceCount(); i++)
{
var sentence = corpus.GetSentence(i);
for (j = 0; j < sentence.WordCount() - 1; j++)
{
var word = (DisambiguatedWord)sentence.GetWord(j);
var nextWord = (DisambiguatedWord)sentence.GetWord(j + 1);
words2[0] = word.GetParse().GetWordWithPos();
words1[0] = words2[0];
words2[1] = nextWord.GetParse().GetWordWithPos();
wordUniGramModel.AddNGram(words1);
wordBiGramModel.AddNGram(words2);
int k;
for (k = 0; k < nextWord.GetParse().Size(); k++)
{
igs2[0] = new Word(word.GetParse().GetLastInflectionalGroup().ToString());
igs2[1] = new Word(nextWord.GetParse().GetInflectionalGroup(k).ToString());
igBiGramModel.AddNGram(igs2);
igs1[0] = igs2[1];
igUniGramModel.AddNGram(igs1);
}
}
}
wordUniGramModel.CalculateNGramProbabilities(new LaplaceSmoothing <Word>());
igUniGramModel.CalculateNGramProbabilities(new LaplaceSmoothing <Word>());
wordBiGramModel.CalculateNGramProbabilities(new LaplaceSmoothing <Word>());
igBiGramModel.CalculateNGramProbabilities(new LaplaceSmoothing <Word>());
}
/**
* <summary> The train method initially creates new NGrams; wordUniGramModel, wordBiGramModel, igUniGramModel, and igBiGramModel. It gets the
* sentences from given corpus and gets each word as a DisambiguatedWord. Then, adds the word together with its part of speech
* tags to the wordUniGramModel. It also gets the transition list of that word and adds it to the igUniGramModel.
* <p/>
* If there exists a next word in the sentence, it adds the current and next {@link DisambiguatedWord} to the wordBiGramModel with
* their part of speech tags. It also adds them to the igBiGramModel with their transition lists.
* <p/>
* At the end, it calculates the NGram probabilities of both word and ig unigram models by using LaplaceSmoothing, and
* both word and ig bigram models by using InterpolatedSmoothing.</summary>
*
* <param name="corpus">{@link DisambiguationCorpus} to train.</param>
*/
public override void Train(DisambiguationCorpus corpus)
{
int i, j;
var words1 = new Word[1];
var igs1 = new Word[1];
var words2 = new Word[2];
var igs2 = new Word[2];
wordUniGramModel = new NGram <Word>(1);
wordBiGramModel = new NGram <Word>(2);
igUniGramModel = new NGram <Word>(1);
igBiGramModel = new NGram <Word>(2);
for (i = 0; i < corpus.SentenceCount(); i++)
{
var sentence = corpus.GetSentence(i);
for (j = 0; j < sentence.WordCount(); j++)
{
var word = (DisambiguatedWord)sentence.GetWord(j);
words1[0] = word.GetParse().GetWordWithPos();
wordUniGramModel.AddNGram(words1);
igs1[0] = new Word(word.GetParse().GetTransitionList());
igUniGramModel.AddNGram(igs1);
if (j + 1 < sentence.WordCount())
{
words2[0] = words1[0];
words2[1] = ((DisambiguatedWord)sentence.GetWord(j + 1)).GetParse().GetWordWithPos();
wordBiGramModel.AddNGram(words2);
igs2[0] = igs1[0];
igs2[1] = new Word(((DisambiguatedWord)sentence.GetWord(j + 1)).GetParse()
.GetTransitionList());
igBiGramModel.AddNGram(igs2);
}
}
}
wordUniGramModel.CalculateNGramProbabilities(new LaplaceSmoothing <Word>());
igUniGramModel.CalculateNGramProbabilities(new LaplaceSmoothing <Word>());
wordBiGramModel.CalculateNGramProbabilities(new LaplaceSmoothing <Word>());
igBiGramModel.CalculateNGramProbabilities(new LaplaceSmoothing <Word>());
}