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 }