private Arquivo AvaliarWekaClassificacao(Arquivo _arquivoAvaliado)
{
// Importa o Classificador que foi salvo pelo treinamento
FilteredClassifier classifier = (FilteredClassifier)ImportaClassificadorSalvo();
// Importa os Dados de Treinamento salvo pelo treinamento
Instances dadosTreinamento = ImportaDadosTreinamentoSalvo();
dadosTreinamento.setClassIndex(dadosTreinamento.numAttributes() - 1); // Classe fica em último
int numAttributes = dadosTreinamento.numAttributes();
// Cria a instância de teste
Instance instance = new DenseInstance(numAttributes);
instance.setDataset(dadosTreinamento);
// Inicializa todos os atributos como valor zero.
for (int i = 0; i < numAttributes; i++)
{
instance.setValue(i, 0);
}
// Insere o texto a ser avaliado no primeiro atributo
for (int i = 0; i < numAttributes - 1; i++)
{
instance.setValue(i, _arquivoAvaliado.TextoFormatado);
}
// Indica que a Classe está faltando, para que a mesma possa ser classificada
instance.setClassMissing();
// Classifica a instância de teste
var resultado = "";
try
{
// Realiza a classificação da instância, retornando o resultado previsto
var predicao = classifier.classifyInstance(instance);
instance.setClassValue(predicao);
// Realiza a tradução do resultado numérico na Classificação esperada
resultado = dadosTreinamento.classAttribute().value((int)predicao);
var distribuicao = classifier.distributionForInstance(instance);
} catch (Exception)
{
throw (new ClassificationException("O texto não pode ser classificado quanto à sua qualidade."));
}
// Atribui o resultado ao arquivo avaliado
_arquivoAvaliado.Classificacao = resultado;
return(_arquivoAvaliado);
}
private void RealizaTreinamentoWeka()
{
TempData["DataTreinamento"] = DateTime.Now;
Instances dadosTreinamento = ImportaArquivosServidor();
// Aplica o filter StringToWordVector
weka.filters.Filter[] filters = new weka.filters.Filter[2];
filters[0] = new StringToWordVector();
filters[1] = AttributeSelectionFilter(2);
weka.filters.MultiFilter filter = new weka.filters.MultiFilter();
filter.setInputFormat(dadosTreinamento);
filter.setFilters(filters);
// Cria o Classificador a partir dos dados de treinamento
FilteredClassifier classifier = new FilteredClassifier();
classifier.setFilter(filter);
classifier.setClassifier(new NaiveBayes());
classifier.buildClassifier(dadosTreinamento);
// Realiza um CrossValidation pra expôr as estatísticas do Classificador
/*
* Evaluation eval = new Evaluation(dadosTreinamento);
* eval.crossValidateModel(classifier, dadosTreinamento, 10, new java.util.Random(1));
*
* var EstatisticasTexto =
* "Instâncias Corretas: \t" + eval.correct() + " (" + Math.Round(eval.pctCorrect(),2) + "%)" + System.Environment.NewLine
+ "Instâncias Incorretas: \t" + eval.incorrect() + " (" + Math.Round(eval.pctIncorrect(),2) + "%)" + System.Environment.NewLine
+ "Total de Instâncias: \t\t" + eval.numInstances();
+
+
+ TempData["TreinamentoRealizado"] = EstatisticasTexto;
*/
// Salva o Classificador (model) como /Classificador/Classificador.model
SerializationHelper.write(string.Format("{0}Classificador.model", DiretorioClassificadorServidor), classifier);
// Salva os dados de treinamento como /Classificador/DadosTreinamento.arff
Utilidades.SalvarArff(dadosTreinamento, DiretorioClassificadorServidor, "DadosTreinamento.arff");
}
/// <summary>
/// Filtered Support Vector Machine Classification with type specified. i.e. BOF or BOW
/// </summary>
/// <param name="type"></param>
private void FilteredSVM(string type, string trainingFilePath, string directoryName, TextFilterType textFilterType)
{
var currDir = System.Environment.GetFolderPath(System.Environment.SpecialFolder.ApplicationData);
// Combine the base folder with your specific folder....
string specificFolder = System.IO.Path.Combine(currDir, "MARC 2.0");
// Check if folder exists and if not, create it
if (!Directory.Exists(specificFolder))
{
Directory.CreateDirectory(specificFolder);
}
try
{
var trainingDatatsetFilePath = "";
if (type == "BOF")
{
trainingDatatsetFilePath = specificFolder + "\\InputData\\TrainingDatasets\\BOF Dataset.arff";
}
else
{
trainingDatatsetFilePath = specificFolder + "\\InputData\\TrainingDatasets\\BOW Dataset.arff";
}
var testDatasetFilePath = specificFolder + "\\InputData\\TrainingDatasets\\Test.arff";
// If training file path is supplied then use it.
if (trainingFilePath != null)
{
trainingDatatsetFilePath = trainingFilePath;
}
java.io.BufferedReader trainReader = new BufferedReader(new FileReader(trainingDatatsetFilePath)); //File with text examples
BufferedReader classifyReader = new BufferedReader(new FileReader(testDatasetFilePath)); //File with text to classify
Instances trainInsts = new Instances(trainReader);
Instances classifyInsts = new Instances(classifyReader);
trainInsts.setClassIndex(trainInsts.numAttributes() - 1);
classifyInsts.setClassIndex(classifyInsts.numAttributes() - 1);
FilteredClassifier model = new FilteredClassifier();
StringToWordVector stringtowordvector = new StringToWordVector();
stringtowordvector.setTFTransform(true);
model.setFilter(new StringToWordVector());
weka.classifiers.Classifier smocls = new weka.classifiers.functions.SMO();
//smocls.setOptions(weka.core.Utils.splitOptions("-C 1.0 -L 0.001 -P 1.0E-12 -N 0 -V -1 -W 1 -K \"weka.classifiers.functions.supportVector.Puk -C 250007 -O 1.0 -S 1.0\""));
smocls.setOptions(weka.core.Utils.splitOptions("-C 1.0 -L 0.0010 -P 1.0E-12 -N 0 -V -1 -W 1 -K \"weka.classifiers.functions.supportVector.PolyKernel -C 250007 -E 1.0\""));
model.setClassifier(smocls);
bool exists;
var directoryRoot = System.IO.Path.GetDirectoryName(Directory.GetCurrentDirectory());
directoryRoot = specificFolder;
//Check if the model exists and if not then build a model
switch (textFilterType)
{
case TextFilterType.NoFilter:
exists = SVMNoFilterCheckifModelExists(trainingDatatsetFilePath);
//if does not exists then build model and save it and save the file also for current filter
if (!exists)
{
model.buildClassifier(trainInsts);
Helper.Helper.WriteToBinaryFile <FilteredClassifier>(directoryRoot + @"\Model\SVM\SVMNoFilterModel.dat", model);
string content = System.IO.File.ReadAllText(trainingDatatsetFilePath);
using (var sW = new StreamWriter(directoryRoot + @"\Model\SVM\\SVMNoFilterFile.dat"))
{
sW.Write(content);
}
}
// if exists then read the file and use the model
else
{
model = Helper.Helper.ReadFromBinaryFile <FilteredClassifier>(directoryRoot + @"\Model\SVM\SVMNoFilterModel.dat");
}
break;
//Case Stopwords Removal
case TextFilterType.StopwordsRemoval:
exists = SVMSWRCheckifModelExists(trainingDatatsetFilePath);
//if does not exists then build model and save it and save the file also for current filter
if (!exists)
{
model.buildClassifier(trainInsts);
Helper.Helper.WriteToBinaryFile <FilteredClassifier>(directoryRoot + @"\Model\SVM\SVMSWRFilterModel.dat", model);
string content = System.IO.File.ReadAllText(trainingDatatsetFilePath);
using (var sW = new StreamWriter(directoryRoot + @"\Model\SVM\\SVMSWRFile.dat"))
{
sW.Write(content);
}
}
// if exists then read the file and use the model
else
{
model = Helper.Helper.ReadFromBinaryFile <FilteredClassifier>(directoryRoot + @"\Model\SVM\SVMSWRFilterModel.dat");
}
break;
//Case Stemming
case TextFilterType.Stemming:
exists = SVMSTCheckifModelExists(trainingDatatsetFilePath);
//if does not exists then build model and save it and save the file also for current filter
if (!exists)
{
model.buildClassifier(trainInsts);
Helper.Helper.WriteToBinaryFile <FilteredClassifier>(directoryRoot + @"\Model\SVM\SVMSTFilterModel.dat", model);
string content = System.IO.File.ReadAllText(trainingDatatsetFilePath);
using (var sW = new StreamWriter(directoryRoot + @"\Model\SVM\\SVMSTFile.dat"))
{
sW.Write(content);
}
}
// if exists then read the file and use the model
else
{
model = Helper.Helper.ReadFromBinaryFile <FilteredClassifier>(directoryRoot + @"\Model\SVM\SVMSTFilterModel.dat");
}
break;
//Case Stopwords Removal with Stemming
case TextFilterType.StopwordsRemovalStemming:
exists = SVMSWRSTCheckifModelExists(trainingDatatsetFilePath);
//if does not exists then build model and save it and save the file also for current filter
if (!exists)
{
model.buildClassifier(trainInsts);
Helper.Helper.WriteToBinaryFile <FilteredClassifier>(directoryRoot + @"\Model\SVM\SVMSWRSTFilterModel.dat", model);
string content = System.IO.File.ReadAllText(trainingDatatsetFilePath);
using (var sW = new StreamWriter(directoryRoot + @"\Model\SVM\\SVMSWRSTFile.dat"))
{
sW.Write(content);
}
}
// if exists then read the file and use the model
else
{
model = Helper.Helper.ReadFromBinaryFile <FilteredClassifier>(directoryRoot + @"\Model\SVM\SVMSWRSTFilterModel.dat");
}
break;
default:
break;
}
//model.buildClassifier(trainInsts);
for (int i = 0; i < classifyInsts.numInstances(); i++)
{
classifyInsts.instance(i).setClassMissing();
double cls = model.classifyInstance(classifyInsts.instance(i));
classifyInsts.instance(i).setClassValue(cls);
classification = cls == 0 ? "Bug Report"
: cls == 1 ? "Feature Request"
: "Other";
tempAllClassification.Add(classification);
}
AllClassification = tempAllClassification;
}
catch (Exception o)
{
error = o.ToString();
}
}
//public object Clone() {
// MemoryStream ms = new MemoryStream(500000000);
// System.Runtime.Serialization.Formatters.Binary.BinaryFormatter bf =
// new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter(null,
// new System.Runtime.Serialization.StreamingContext(System.Runtime.Serialization.StreamingContextStates.Clone));
// bf.Serialize(ms, this);
// ms.Seek(0, SeekOrigin.Begin);
// object obj = bf.Deserialize(ms);
// ms.Close();
// return obj;
//}
public void train(bool LoadingFromFile)
{
if (!LoadingFromFile) {
DisplayMessage("Begin training on Efigi galaxies...");
Console.Write("Begin training on Efigi galaxies...");
}
else {
DisplayImage(0);
DisplayMessage("Load from file...");
Console.Write("Load from file...");
frV = new GeneralMatrix(ReadFVMatrix(0));
fgV = new GeneralMatrix(ReadFVMatrix(1));
fbV = new GeneralMatrix(ReadFVMatrix(2));
}
weka.classifiers.trees.M5P tree = new weka.classifiers.trees.M5P();
String[] options = new String[1];
weka.core.converters.ConverterUtils.DataSource source = new weka.core.converters.ConverterUtils.DataSource(OutputDir + "Results/" + "resultsGalaxy.arff");
data = source.getDataSet();
if (data == null) {
DisplayMessage("Cannot load from file.");
throw new Exception("Arff File not valid");
}
data.setClassIndex(0);
tree.buildClassifier(data);
StreamWriter output = new StreamWriter(OutputDir + "Results/" + "classification.txt");
rmse = 0.0;
int classifiedCount = 0;
weka.filters.unsupervised.attribute.Remove rm = new weka.filters.unsupervised.attribute.Remove();
rm.setInputFormat(data);
fc = new FilteredClassifier();
fc.setFilter(rm);
fc.setClassifier(tree);
for (int i = 0; i < data.numInstances(); i++) {
int classPrediction = (int)Math.Round(fc.classifyInstance(data.instance(i)));
if (classPrediction < -6) {
classPrediction = -6;
}
else if (classPrediction > 11) {
classPrediction = 11;
}
int actualClass = (int)Math.Round(data.instance(i).classValue());
int error = Math.Abs(classPrediction - actualClass);
rmse += error * error;
classifiedCount++;
output.WriteLine("\n" + classPrediction + ", " + error);
if (i % 10 == 0 && !LoadingFromFile)
DisplayImage(i);
}
rmse = Math.Sqrt(rmse / classifiedCount);
output.WriteLine("\nRMSE: " + rmse);
DisplayMessage("RMSE: " + rmse);
output.Flush();
output.Close();
output.Dispose();
readyToClassify = true;
Console.WriteLine("Finished training on Efigi galaxies; RMSE: " + rmse.ToString());
}
