public Dictionary<Sequence, int> GetTopicSequenceFrequences(int sequenceLength)
{
var topicQuestionPairsSequences =
GetTopicQuestionPairSequences(sequenceLength).Select(seq => seq.Select(pair => pair.Item1).ToList());
var topicSequences = new Dictionary<Sequence, int>();
foreach (var topicList in topicQuestionPairsSequences)
{
var seq = new Sequence(topicList.Count, topicList);
if (!topicSequences.ContainsKey(seq))
{
topicSequences[seq] = 0;
}
topicSequences[seq]++;
}
return topicSequences;
}
private double GetGivenProbability(Sequence move)
{
if (!topicMoves.ContainsKey(move))
{
return 0;
}
return ((double)topicMoves[move]) * userQuestionsCount / (topicDistribution[move.Items[0]] * topicDistribution[move.Items[1]]);
}
public Dictionary<Sequence, List<List<Question>>> GetTopicMoveQuestions(int lowFrequencyBoundary)
{
var moveQuestions = new Dictionary<Sequence, List<List<Question>>>();
if (topicMoves.Count == 0) return moveQuestions;
var sequenceLength = topicMoves.First().Key.Items.Length;
var topicQuestionPairSequences = GetTopicQuestionPairSequences(sequenceLength);
foreach (var sequence in topicQuestionPairSequences)
{
var topicSequence = new Sequence(sequence.Count, sequence.Select(pair => pair.Item1).ToList());
if (!moveQuestions.ContainsKey(topicSequence))
moveQuestions[topicSequence] = new List<List<Question>>();
moveQuestions[topicSequence].Add(sequence.Select(pair => pair.Item2).ToList());
}
return moveQuestions.Where(kv => kv.Value.Count >= lowFrequencyBoundary).ToDictionary(kv => kv.Key, kv => kv.Value);
}