public virtual AbstractModel trainModel(int iterations, SequenceStream sequenceStream, int cutoff,
bool useAverage)
{
this.iterations = iterations;
this.sequenceStream = sequenceStream;
DataIndexer di = new OnePassDataIndexer(new SequenceStreamEventStream(sequenceStream), cutoff, false);
numSequences = 0;
foreach (Sequence <Event> s in sequenceStream)
{
numSequences++;
}
outcomeList = di.OutcomeList;
predLabels = di.PredLabels;
pmap = new IndexHashTable <string>(predLabels, 0.7d);
display("Incorporating indexed data for training... \n");
this.useAverage = useAverage;
numEvents = di.NumEvents;
this.iterations = iterations;
outcomeLabels = di.OutcomeLabels;
omap = new Dictionary <string, int?>();
for (int oli = 0; oli < outcomeLabels.Length; oli++)
{
omap[outcomeLabels[oli]] = oli;
}
outcomeList = di.OutcomeList;
numPreds = predLabels.Length;
numOutcomes = outcomeLabels.Length;
if (useAverage)
{
updates = RectangularArrays.ReturnRectangularIntArray(numPreds, numOutcomes, 3);
}
display("done.\n");
display("\tNumber of Event Tokens: " + numEvents + "\n");
display("\t Number of Outcomes: " + numOutcomes + "\n");
display("\t Number of Predicates: " + numPreds + "\n");
parameters = new MutableContext[numPreds];
if (useAverage)
{
averageParams = new MutableContext[numPreds];
}
allOutcomesPattern = new int[numOutcomes];
for (int oi = 0; oi < numOutcomes; oi++)
{
allOutcomesPattern[oi] = oi;
}
for (int pi = 0; pi < numPreds; pi++)
{
parameters[pi] = new MutableContext(allOutcomesPattern, new double[numOutcomes]);
if (useAverage)
{
averageParams[pi] = new MutableContext(allOutcomesPattern, new double[numOutcomes]);
}
for (int aoi = 0; aoi < numOutcomes; aoi++)
{
parameters[pi].setParameter(aoi, 0.0);
if (useAverage)
{
averageParams[pi].setParameter(aoi, 0.0);
}
}
}
modelDistribution = new double[numOutcomes];
display("Computing model parameters...\n");
findParameters(iterations);
display("...done.\n");
/// <summary>
///************* Create and return the model ***************** </summary>
string[] updatedPredLabels = predLabels;
/*
* String[] updatedPredLabels = new String[pmap.size()];
* for (String pred : pmap.keySet()) {
* updatedPredLabels[pmap.get(pred)]=pred;
* }
*/
if (useAverage)
{
return(new PerceptronModel(averageParams, updatedPredLabels, outcomeLabels));
}
else
{
return(new PerceptronModel(parameters, updatedPredLabels, outcomeLabels));
}
}
public AbstractModel TrainModel(int trainIterations, ISequenceStream trainStream, int cutoff,
bool trainUseAverage)
{
iterations = trainIterations;
useAverage = trainUseAverage;
sequenceStream = trainStream;
info.Append("Trained using Perceptron Sequence algorithm.\n\n");
var di = new OnePassDataIndexer(new SequenceStreamEventStream(trainStream), cutoff, false);
trainStream.Reset();
numSequences = 0;
while (trainStream.Read() != null)
{
numSequences++;
}
outcomeList = di.GetOutcomeList();
predLabels = di.GetPredLabels();
pMap = new IndexHashTable <string>(predLabels, 0.7d);
// Incorporation indexed data for training...
numEvents = di.GetNumEvents();
outcomeLabels = di.GetOutcomeLabels();
oMap = new Dictionary <string, int>();
for (var i = 0; i < outcomeLabels.Length; i++)
{
oMap.Add(outcomeLabels[i], i);
}
outcomeList = di.GetOutcomeList();
numPreds = predLabels.Length;
numOutcomes = outcomeLabels.Length;
if (trainUseAverage)
{
updates = new int[numPreds][][];
for (var i = 0; i < numPreds; i++)
{
updates[i] = new int[numOutcomes][];
for (var j = 0; j < numOutcomes; j++)
{
updates[i][j] = new int[3];
}
}
}
// done.
Display("done.\n");
info.Append("Number of Event Tokens: {0}\n" +
" Number of Outcomes: {1}\n" +
" Number of Predicates: {2}\n", numEvents, numOutcomes, numPreds);
Display("\tNumber of Event Tokens: " + numEvents);
Display("\t Number of Outcomes: " + numOutcomes);
Display("\t Number of Predicates: " + numPreds);
param = new MutableContext[numPreds];
if (trainUseAverage)
{
averageParams = new MutableContext[numPreds];
}
allOutcomesPattern = new int[numOutcomes];
for (var i = 0; i < numOutcomes; i++)
{
allOutcomesPattern[i] = i;
}
for (var pi = 0; pi < numPreds; pi++)
{
param[pi] = new MutableContext(allOutcomesPattern, new double[numOutcomes]);
if (trainUseAverage)
{
averageParams[pi] = new MutableContext(allOutcomesPattern, new double[numOutcomes]);
}
for (var aoi = 0; aoi < numOutcomes; aoi++)
{
param[pi].SetParameter(aoi, 0.0d);
if (trainUseAverage)
{
averageParams[pi].SetParameter(aoi, 0.0d);
}
}
}
Display("Computing model parameters...");
FindParameters();
Display("...done.");
/*************** Create and return the model ******************/
// ReSharper disable CoVariantArrayConversion
if (trainUseAverage)
{
return new PerceptronModel(averageParams, predLabels, outcomeLabels)
{
info = info
}
}
;
return(new PerceptronModel(param, predLabels, outcomeLabels)
{
info = info
});
// ReSharper restore CoVariantArrayConversion
}
