public static HMMGroup CreateHiddenMarkovModel(IEnumerable <string> fileNames, int?length = null, SplitAlgorithm algo = SplitAlgorithm.Simple, bool ignoreCase = false)
{
string[][] ngrams = null;
switch (algo)
{
case SplitAlgorithm.Simple:
ngrams = GetNgramsSimple(fileNames, length ?? 8);
break;
case SplitAlgorithm.Pairs:
ngrams = GetNgramsPairs(fileNames, length ?? 8);
break;
case SplitAlgorithm.ByWord:
ngrams = GetNgrams(fileNames, length, true, ignoreCase);
break;
}
var codebook = new Codification("data", ngrams);
var sequence = codebook.ParallelTransform("data", ngrams);
ngrams = null;
var topology = new Forward(states: 4);
int symbols = codebook["data"].NumberOfSymbols;
var hmm = new HiddenMarkovModel(topology, symbols);
var teacher = new BaumWelchLearning(hmm);
teacher.Learn(sequence);
return(new HMMGroup
{
Model = hmm,
Codebook = codebook,
Length = length
});
}
