public override double ComputeSimilarity(WeightDictionary vectorA, WeightDictionary vectorB)
{
WeightDictionaryEntryPairs termPairs = new WeightDictionaryEntryPairs(vectorA, vectorB);
if (termPairs.Count == 0)
{
return(0);
}
return(Compute(termPairs));
}
private Double Compute(WeightDictionaryEntryPairs termPairs)
{
Double above = 0;
Double belowA = 0;
Double belowB = 0;
foreach (WeightDictionaryEntryPair pair in termPairs)
{
above += pair.weight_A * pair.weight_B;
belowA += pair.weight_A_sq;
belowB += pair.weight_B_sq;
}
belowA = Math.Sqrt(belowA);
belowB = Math.Sqrt(belowB);
return(above / (belowA * belowB));
}
