/// <summary>
/// Calculates a single items probability of being in set A
/// </summary>
/// <param name="Item">Item to calculate</param>
/// <returns>The probability that the token is from set A</returns>
protected virtual double CalculateProbabilityOfToken(T Item)
{
Contract.Requires <ArgumentNullException>(SetA != null && SetB != null, "Probabilities have not been initialized");
double Probability = 0;
int ACount = SetA.Contains(Item) ? SetA[Item] * ATokenWeight : 0;
int BCount = SetB.Contains(Item) ? SetB[Item] * BTokenWeight : 0;
if (ACount + BCount >= MinCountForInclusion)
{
double AProbability = ((double)ACount / (double)TotalA).Min(1);
double BProbability = ((double)BCount / (double)TotalB).Min(1);
Probability = MinTokenProbability.Max(MaxTokenProbability.Min(AProbability / (AProbability + BProbability)));
}
return(Probability);
}
/// <summary>
/// Calculates a single items probability of being in set A
/// </summary>
/// <param name="Item">Item to calculate</param>
/// <returns>The probability that the token is from set A</returns>
protected virtual double CalculateProbabilityOfToken(T Item)
{
if (SetA == null || SetB == null)
{
throw new NullReferenceException("Probabilities have not been initialized");
}
double Probability = 0;
int ACount = SetA.Contains(Item) ? SetA[Item] * ATokenWeight : 0;
int BCount = SetB.Contains(Item) ? SetB[Item] * BTokenWeight : 0;
if (ACount + BCount >= MinCountForInclusion)
{
double AProbability = ((double)ACount / (double)TotalA).Min(1);
double BProbability = ((double)BCount / (double)TotalB).Min(1);
Probability = MinTokenProbability.Max(MaxTokenProbability.Min(AProbability / (AProbability + BProbability)));
}
return(Probability);
}
