/// <summary>
/// The get taxons value.
/// </summary>
/// <param name="alphabet">
/// The alphabet.
/// </param>
/// <returns>
/// The <see cref="double"/>.
/// </returns>
public double GetTaxonsValue(FrequencyDictionary alphabet)
{
double taxons = 0;
List<List<int>> positions = alphabet.GetWordsPositions();
for (int index = 0; index < alphabet.Count; index++)
{
int countT = positions[index].Count;
taxons += (Math.Log(countT) * countT) - countT;
}
return taxons;
}
/// <summary>
/// The max frequency.
/// </summary>
/// <param name="alphabet">
/// The alphabet.
/// </param>
/// <returns>
/// The <see cref="int"/>.
/// </returns>
private int MaxFrequency(FrequencyDictionary alphabet)
{
return alphabet.GetWordsPositions().Max(p => p.Count);
}
/// <summary>
/// The symmetry.
/// </summary>
/// <param name="alphabet">
/// The alphabet.
/// </param>
/// <returns>
/// The <see cref="double"/>.
/// </returns>
private double Symmetry(FrequencyDictionary alphabet)
{
double taxons = 0;
double merons = 0;
int arrayMaxLength = 0;
List<List<int>> positions = alphabet.GetWordsPositions();
for (int index = 0; index < alphabet.Count; index++)
{
int countT = positions[index].Count;
taxons += (Math.Log(countT) * countT) - countT;
int arraySize = positions[index].Count;
if (arrayMaxLength < arraySize)
{
arrayMaxLength = arraySize;
}
}
for (int meronIndex = 0, countM = 0; meronIndex < arrayMaxLength; meronIndex++)
{
for (int index = 0; index < alphabet.Count; index++)
{
if (positions[index].Count >= meronIndex)
{
countM = countM + 1;
}
}
merons += (Math.Log(countM) * countM) - countM;
countM = 0;
}
return taxons + merons;
}
