/// <summary>
/// Calculates the distance between pair of words in the same language.
/// </summary>
public static double SemSim(
string firstWord, string secondWord, string langCode)
{
WordsAndCounts firstWordContext;
if (useReverseContext)
{
firstWordContext = SemanticSimilarityUtils.
RetrieveContextWordsWithReverseContext(firstWord, langCode);
}
else if (useQueryLemmatization)
{
firstWordContext = SemanticSimilarityUtils.
RetrieveContextWordsForAllWordForms(firstWord, langCode);
}
else if (useIndirectContext)
{
firstWordContext = SemanticSimilarityUtils.
RetrieveContextWordsWithIndirectContext(firstWord, langCode);
}
else
{
firstWordContext = SemanticSimilarityUtils.
RetrieveContextWords(firstWord, langCode);
}
WordsAndCounts secondWordContext;
if (useReverseContext)
{
secondWordContext = SemanticSimilarityUtils.
RetrieveContextWordsWithReverseContext(secondWord, langCode);
}
else if (useQueryLemmatization)
{
secondWordContext = SemanticSimilarityUtils.
RetrieveContextWordsForAllWordForms(secondWord, langCode);
}
else if (useIndirectContext)
{
secondWordContext = SemanticSimilarityUtils.
RetrieveContextWordsWithIndirectContext(secondWord, langCode);
}
else
{
secondWordContext = SemanticSimilarityUtils.
RetrieveContextWords(secondWord, langCode);
}
if (useTFIDF)
{
ApplyTFIDFWeighting(firstWordContext, langCode);
ApplyTFIDFWeighting(secondWordContext, langCode);
}
if (vectorDiffAlgorithm == VectorDiffAlgorithm.COSINE)
{
double distance = VectorUtils.CalcCosinusBetweenWordsCounts(
firstWordContext, secondWordContext);
return(distance);
}
else
{
throw new Exception("Algorithm not supported!");
}
}