/// <summary>
/// Вычисляет коэффициент взаимной информации
/// </summary>
/// <param name="bigramm"></param>
/// <returns></returns>
public double Calculate(string bigramm)
{
var freq = new Frequency(_words);
var bigramWords = bigramm.Split(' ');
var f1 = freq.GetByOneWord(bigramWords[0]);
var f2 = freq.GetByOneWord(bigramWords[1]);
var f12 = freq.GetByBigramm(bigramm);
return Math.Log(((double)f12 * N) / (f1 * f2), 2);
}
/// <summary>
/// Вычисляет коэффициент взаимной информации
/// </summary>
/// <param name="bigramm"></param>
/// <returns></returns>
public double Calculate(string bigramm)
{
var freq = new Frequency(_words);
var bigramWords = bigramm.Split(' ');
var f1 = freq.GetByOneWord(bigramWords[0]);
var f2 = freq.GetByOneWord(bigramWords[1]);
var f12 = freq.GetByBigramm(bigramm);
return(Math.Log(((double)f12 * N) / (f1 * f2), 2));
}
public double Calculate(string bigramm)
{
var bigrammWords = bigramm.Split(' ');
if (bigrammWords.Count() != 2)
{
throw new ArgumentException("Для оценки частоты биграммы необходимо два слова.");
}
Frequency freq = new Frequency(_words);
double f1 = freq.GetByOneWord(bigrammWords[0]);
double f2 = freq.GetByOneWord(bigrammWords[1]);
double f12 = freq.GetByBigramm(bigramm);
return((f12 - f1 * f2 / (_words.Count - 1)) / Math.Pow(f12, 2));
}
public double Calculate(string word, int collectionLength, int usedCount)
{
Frequency freq = new Frequency(_words);
double f = freq.GetByOneWord(word);
double TF = f / _words.Count;
double IDF = Math.Log((collectionLength - usedCount)/usedCount);
return TF * IDF;
}
public double Calculate(string word, int collectionLength, int usedCount)
{
Frequency freq = new Frequency(_words);
double f = freq.GetByOneWord(word);
double TF = f / _words.Count;
double IDF = Math.Log((collectionLength - usedCount) / usedCount);
return(TF * IDF);
}