public TFIDF(string filePath1, string filePath2, IReworder reworder, IReader reader, bool train)
{
Console.Write(Environment.NewLine + "Preparing IDF");
int linesRead = 0;
foreach (string line in LinesEnumerator.YieldLines(filePath1))
{
List<string> res = reader.Read(ReworderHelper.Map(line, reworder)).Split(' ').ToList();
foreach (string element in res.Distinct())
{
if (_idf.ContainsKey(element))
_idf[element]++;
else
_idf.Add(element, 1);
}
if ((linesRead % DisplaySettings.PrintProgressEveryLine) == 0)
Console.Write('.');
linesRead++;
}
foreach (string line in LinesEnumerator.YieldLines(filePath2))
{
RawQuestion rq = new RawQuestion(line, train);
string[] combinations = rq.GetCombinations();
for (int i = 0; i < combinations.Length; i++)
foreach (string element in reader.Read(ReworderHelper.Map(combinations[i], reworder)).Split(' ').Distinct())
{
if (_idf.ContainsKey(element))
_idf[element]++;
else
_idf.Add(element, 1);
}
if ((linesRead % DisplaySettings.PrintProgressEveryLine) == 0)
Console.Write('.');
linesRead++;
}
int n = _idf.Count;
string[] originalKeys = _idf.Keys.ToArray();
foreach (string key in originalKeys)
_idf[key] = Math.Log(n * 1f / _idf[key]);
}
private string AnswerOneQuestion(RawQuestion mcq, bool proba)
{
string question = mcq.Question;
string[] proposals = mcq.GetMarkovCombinations();
double[] likelihoods = new double[proposals.Length];
for (int i = 0; i < likelihoods.Length; i++)
{
string mappedLine = ReworderHelper.Map(proposals[i], _reworder);
string readQuestion = _reader.Read(mappedLine);
// should not be there, simple precaution
Regex multipleSpaces = new Regex("[ ]+");
readQuestion = multipleSpaces.Replace(readQuestion, " ");
string[] splittedQuestion = readQuestion.Split(' ').ToArray();
string[] stackedQuestion = Stack(splittedQuestion, _order);
likelihoods[i] = _smc.LengthNormalizedLogLikelihood(stackedQuestion);
}
double targetLikelihood = 0;
if (mcq.Negated)
targetLikelihood = likelihoods.Max();
else
targetLikelihood = likelihoods.Max();
if (proba)
{
int[] candidates = likelihoods.Select((b, i) =>
b == targetLikelihood ? i : -1).Where(i => i != -1).ToArray();
return String.Join(" ", candidates.Select(c =>
IntToAnswers.ToAnswer(c % 4) + ":" + (1f / candidates.Length).ToString().Replace(',', '.')));
}
else
{
int bestcandidate = Array.FindIndex(likelihoods, d => d == targetLikelihood) % 4;
return IntToAnswers.ToAnswer(bestcandidate);
}
}
