/**
* <summary>Gets bigram probability of given symbols w1 and w2</summary>
*
* <param name="w1">first gram of bigram.</param>
* <param name="w2">second gram of bigram.</param>
* <returns>probability of given bigram</returns>
*/
public double GetBiGramProbability(TSymbol w1, TSymbol w2)
{
if (_children.ContainsKey(w1))
{
var child = _children[w1];
return(child.GetUniGramProbability(w2));
}
if (_unknown != null)
{
return(_unknown.GetUniGramProbability(w2));
}
throw new UnseenCase();
}
/**
* <summary>Gets unigram probability of given symbol.</summary>
* <param name="w1">a unigram symbol.</param>
* <returns>probability of given unigram.</returns>
*/
private double GetUniGramProbability(TSymbol w1)
{
return(rootNode.GetUniGramProbability(w1));
}
