public static double InverseDocumentFrequency(Term t)
{
return Math.Log10(NumberOfDocuments / t.Frequency);
}
public static double GetNormalizedTermFrequencyInDocument(Term term, int docId, double[] maxTermFrequencyInDocument)
{
try
{
int tf = term.GetTermFrequencyInDocument(docId);
if (tf != 0)
{
return (a + (1 - a) * (term.GetTermFrequencyInDocument(docId) / maxTermFrequencyInDocument[docId - 1]));
}
else
{
return 0;
}
}
catch
{
return 0;
}
}