public void SetTrainingSet(DataSet train)
{
m_TrainingSet = train;
}
public void SetValidationSet(DataSet validation)
{
m_ValidationSet = validation;
}
public override void SetValidationSet(DataSet validation)
{
m_ValidationSet = validation;
forwardRNN.SetValidationSet(validation);
backwardRNN.SetValidationSet(validation);
}
static void LoadDataset(string strFileName, Featurizer featurizer, DataSet dataSet)
{
CheckCorpus(strFileName);
StreamReader sr = new StreamReader(strFileName);
int RecordCount = 0;
while (true)
{
//Extract features from it and convert it into sequence
Sentence sent = new Sentence(ReadRecord(sr));
if (sent.TokensList.Count <= 2)
{
//No more record, it only contain <s> and </s>
break;
}
Sequence seq = featurizer.ExtractFeatures(sent);
//Set label for the sequence
seq.SetLabel(sent, featurizer.TagSet);
//Add the sequence into data set
dataSet.SequenceList.Add(seq);
//Show state at every 1000 record
RecordCount++;
if (RecordCount % 10000 == 0)
{
Logger.WriteLine(Logger.Level.info, "{0}...", RecordCount);
}
}
sr.Close();
}
public override void SetTrainingSet(DataSet train)
{
m_TrainingSet = train;
fea_size = m_TrainingSet.GetDenseDimension();
L0 = m_TrainingSet.GetSparseDimension() + L1;
L2 = m_TrainingSet.GetTagSize();
forwardRNN.SetTrainingSet(train);
backwardRNN.SetTrainingSet(train);
}
private static void Train()
{
if (File.Exists(strTagFile) == false)
{
Console.WriteLine("FAILED: The tag mapping file {0} isn't existed.", strTagFile);
UsageTrain();
return;
}
//Load tag id and its name from file
TagSet tagSet = new TagSet(strTagFile);
//Create configuration instance and set parameters
ModelSetting RNNConfig = new ModelSetting();
RNNConfig.SetModelFile(strModelFile);
RNNConfig.SetNumHidden(layersize);
RNNConfig.SetCRFTraining((iCRF == 1) ? true : false);
RNNConfig.SetDir(iDir);
RNNConfig.SetModelType(modelType);
RNNConfig.SetMaxIteration(maxIter);
RNNConfig.SetSaveStep(savestep);
RNNConfig.SetLearningRate(alpha);
RNNConfig.SetRegularization(beta);
RNNConfig.SetBptt(bptt);
//Dump RNN setting on console
RNNConfig.DumpSetting();
if (File.Exists(strFeatureConfigFile) == false)
{
Console.WriteLine("FAILED: The feature configuration file {0} isn't existed.", strFeatureConfigFile);
UsageTrain();
return;
}
//Create feature extractors and load word embedding data from file
Featurizer featurizer = new Featurizer(strFeatureConfigFile, tagSet);
featurizer.ShowFeatureSize();
if (File.Exists(strTrainFile) == false)
{
Console.WriteLine("FAILED: The training corpus {0} isn't existed.", strTrainFile);
UsageTrain();
return;
}
//LoadFeatureConfig training corpus and extract feature set
DataSet dataSetTrain = new DataSet(tagSet.GetSize());
LoadDataset(strTrainFile, featurizer, dataSetTrain);
if (File.Exists(strValidFile) == false)
{
Console.WriteLine("FAILED: The validated corpus {0} isn't existed.", strValidFile);
UsageTrain();
return;
}
//LoadFeatureConfig validated corpus and extract feature set
DataSet dataSetValidation = new DataSet(tagSet.GetSize());
LoadDataset(strValidFile, featurizer, dataSetValidation);
//Create RNN encoder and save necessary parameters
RNNEncoder encoder = new RNNEncoder(RNNConfig);
encoder.SetTrainingSet(dataSetTrain);
encoder.SetValidationSet(dataSetValidation);
if (iCRF == 1)
{
Console.WriteLine("Initialize output tag bigram transition probability...");
//Build tag bigram transition matrix
dataSetTrain.BuildLabelBigramTransition();
encoder.SetLabelBigramTransition(dataSetTrain.GetLabelBigramTransition());
}
//Start to train the model
encoder.Train();
}
static void LoadDataset(string strFileName, Featurizer featurizer, DataSet dataSet)
{
CheckCorpus(strFileName);
StreamReader sr = new StreamReader(strFileName);
int RecordCount = 0;
while (true)
{
List<string> tokenList = ReadRecord(sr);
if (tokenList.Count == 0)
{
//No more record
break;
}
//Extract features from it and convert it into sequence
Sentence sent = new Sentence();
sent.SetFeatures(tokenList);
Sequence seq = featurizer.ExtractFeatures(sent);
//Set label for the sequence
if (seq.SetLabel(sent, featurizer.GetTagSet()) == false)
{
Console.WriteLine("Error: Invalidated record.");
sent.DumpFeatures();
continue;
}
//Add the sequence into data set
dataSet.Add(seq);
//Show state at every 1000 record
RecordCount++;
if (RecordCount % 10000 == 0)
{
Console.Write("{0}...", RecordCount);
}
}
Console.WriteLine();
sr.Close();
}
public bool ValidateNet(DataSet validationSet, int iter)
{
Logger.WriteLine("Start validation ...");
int wordcn = 0;
int tknErrCnt = 0;
int sentErrCnt = 0;
//Initialize varibles
logp = 0;
int numSequence = validationSet.SequenceList.Count;
for (int curSequence = 0; curSequence < numSequence; curSequence++)
{
Sequence pSequence = validationSet.SequenceList[curSequence];
wordcn += pSequence.States.Length;
int[] predicted;
if (IsCRFTraining == true)
{
predicted = ProcessSequenceCRF(pSequence, RunningMode.Validate);
}
else
{
Matrix<double> m;
m = ProcessSequence(pSequence, RunningMode.Validate);
predicted = GetBestResult(m);
}
int newTknErrCnt = GetErrorTokenNum(pSequence, predicted);
tknErrCnt += newTknErrCnt;
if (newTknErrCnt > 0)
{
sentErrCnt++;
}
}
double entropy = -logp / Math.Log10(2.0) / wordcn;
double ppl = exp_10(-logp / wordcn);
double tknErrRatio = (double)tknErrCnt / (double)wordcn * 100.0;
double sentErrRatio = (double)sentErrCnt / (double)numSequence * 100.0;
Logger.WriteLine("In validation: error token ratio = {0}% error sentence ratio = {1}%", tknErrRatio, sentErrRatio);
Logger.WriteLine("In training: log probability = " + logp + ", cross-entropy = " + entropy + ", perplexity = " + ppl);
Logger.WriteLine("");
bool bUpdate = false;
if (tknErrRatio < minTknErrRatio)
{
//We have better result on validated set, save this model
bUpdate = true;
minTknErrRatio = tknErrRatio;
}
return bUpdate;
}
public double TrainNet(DataSet trainingSet, int iter)
{
DateTime start = DateTime.Now;
Logger.WriteLine("Iter " + iter + " begins with learning rate alpha = " + RNNHelper.LearningRate + " ...");
//Initialize varibles
logp = 0;
//Shffle training corpus
trainingSet.Shuffle();
int numSequence = trainingSet.SequenceList.Count;
int wordCnt = 0;
int tknErrCnt = 0;
int sentErrCnt = 0;
Logger.WriteLine("Progress = 0/" + numSequence / 1000.0 + "K\r");
for (int curSequence = 0; curSequence < numSequence; curSequence++)
{
Sequence pSequence = trainingSet.SequenceList[curSequence];
wordCnt += pSequence.States.Length;
int[] predicted;
if (IsCRFTraining == true)
{
predicted = ProcessSequenceCRF(pSequence, RunningMode.Train);
}
else
{
Matrix<double> m;
m = ProcessSequence(pSequence, RunningMode.Train);
predicted = GetBestResult(m);
}
int newTknErrCnt = GetErrorTokenNum(pSequence, predicted);
tknErrCnt += newTknErrCnt;
if (newTknErrCnt > 0)
{
sentErrCnt++;
}
if ((curSequence + 1) % 1000 == 0)
{
Logger.WriteLine("Progress = {0} ", (curSequence + 1) / 1000 + "K/" + numSequence / 1000.0 + "K");
Logger.WriteLine(" Train cross-entropy = {0} ", -logp / Math.Log10(2.0) / wordCnt);
Logger.WriteLine(" Error token ratio = {0}%", (double)tknErrCnt / (double)wordCnt * 100.0);
Logger.WriteLine(" Error sentence ratio = {0}%", (double)sentErrCnt / (double)curSequence * 100.0);
}
if (SaveStep > 0 && (curSequence + 1) % SaveStep == 0)
{
//After processed every m_SaveStep sentences, save current model into a temporary file
Logger.WriteLine("Saving temporary model into file...");
SaveModel(ModelTempFile);
}
}
DateTime now = DateTime.Now;
TimeSpan duration = now.Subtract(start);
double entropy = -logp / Math.Log10(2.0) / wordCnt;
double ppl = exp_10(-logp / wordCnt);
Logger.WriteLine("Iter " + iter + " completed");
Logger.WriteLine("Sentences = " + numSequence + ", time escape = " + duration + "s, speed = " + numSequence / duration.TotalSeconds);
Logger.WriteLine("In training: log probability = " + logp + ", cross-entropy = " + entropy + ", perplexity = " + ppl);
return ppl;
}