Examples of weka.core.converters.ArffLoader$ArffReader

weka.core.converters.ArffLoader

Reads data from an ARFF file, either in incremental or batch mode.

Typical code for batch usage:

 BufferedReader reader = new BufferedReader(new FileReader("/some/where/file.arff")); ArffReader arff = new ArffReader(reader); Instances data = arff.getData(); data.setClassIndex(data.numAttributes() - 1);

Typical code for incremental usage:

 BufferedReader reader = new BufferedReader(new FileReader("/some/where/file.arff")); ArffReader arff = new ArffReader(reader, 1000); Instances data = arff.getStructure(); data.setClassIndex(data.numAttributes() - 1); Instance inst; while ((inst = arff.readInstance(data)) != null) { data.add(inst); }

@author Eibe Frank (eibe@cs.waikato.ac.nz) @author Len Trigg (trigg@cs.waikato.ac.nz) @author fracpete (fracpete at waikato dot ac dot nz) @version $Revision: 7048 $

    }


    public double classify(LinkedHashMap<Integer, Double> sample) {
        try {
            Classifier cModel = (LibSVM) loadClassifier();
            ArffLoader loader = new ArffLoader();
            loader.setFile(new File(PropertiesGetter.getProperty("TrainingDataSetObject")));
            Instances structure = loader.getStructure();
            structure.setClassIndex(structure.numAttributes() - 1);
            int numAtts = structure.numAttributes();
            Instance instanceToClassify = getNewInstance(numAtts);
            Iterator<Entry<Integer, Double>> currentIt = sample.entrySet().iterator();
            Entry<Integer, Double> tempEntry;

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    queryAnalyser = new QueryAnalyser();
    loadDataset();
  }
  
  private void loadDataset(){
    ArffLoader loader = new ArffLoader();
    try {
      loader.setFile(new File(WekaParam.TRAINING_DATA_FILE));
      dataSet = loader.getDataSet();
    } catch (IOException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
    dataSet.setClassIndex(dataSet.numAttributes() - 1);

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    }
    return configProperties;
  }
  
  private Instances loadDataset(String datasetPath){
    ArffLoader loader = new ArffLoader();
    Instances dataset = null;
    try {
      loader.setFile(new File(datasetPath));
      dataset = loader.getDataSet();
    } catch (IOException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
    return dataset;

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      final long endTime;
      final float duration;


      
       // load data
       ArffLoader loader = new ArffLoader();
       loader.setFile(new File("./src/trust/weka/BelWeka.arff"));
       Instances data = loader.getDataSet();
       
       WekaClusterClassifier classifier = new WekaClusterClassifier();
       classifier.setDataset(data);
       classifier.getClassifier();

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      final long endTime;
      final float duration;


      
       // load data
       ArffLoader loader = new ArffLoader();
       loader.setFile(new File("./src/trust/weka4jason/trainingSet.arff"));
       Instances data = loader.getDataSet();
       
       WekaBinClassifier classifier = new WekaBinClassifier();
       classifier.setWekaOptions("-F -B 10 -M -1.0 -R last");
       //classifier.setDataset(data);

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      final long endTime;
      final float duration;


      
       // load data
       ArffLoader loader = new ArffLoader();
       loader.setFile(new File("./src/trust/weka4jason/trainingSet.arff"));
       Instances data = loader.getDataSet();
       
       WekaPerceptronClassifier classifier= new WekaPerceptronClassifier();
       
       System.out.println(classifier);

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   * Beliefbase becomes the imput for WEKA algorithms.
   */
  public void test3(){
    try{
     // load data
     ArffLoader loader = new ArffLoader();
     loader.setFile(new File("BelWeka.arff"));
     Instances structure = loader.getStructure();
     
     Instances data = loader.getDataSet();
     
     structure.addAll(data);
     
     
    // System.out.println(" Structure: " + structure);

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      buffer.append("  Password: " + "?" + "\n");  
      buffer.append("  Query: " + databaseLoader.getQuery() + "\n");
      buffer.append("  Key columns' name: " + databaseLoader.getKeys() + "\n");        
    }
    else if(className.equalsIgnoreCase(ArffLoader.class.getName())) {
      ArffLoader arffLoader = (ArffLoader)loader.getLoader();
      buffer.append("  Loader type: ArffLoader" + "\n");
    }
    else if(className.equalsIgnoreCase(CSVLoader.class.getName())) {
      CSVLoader csvLoader = (CSVLoader)loader.getLoader();
      buffer.append("  Loader type: CSVLoader" + "\n");

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        DatabaseLoader databaseLoader = (DatabaseLoader)loader.getLoader();
        if(env.getOutConnection() != null) {
          databaseLoader.setSource(env.getInConnection());
        }
      } else if(className.equalsIgnoreCase(ArffLoader.class.getName())) {
        ArffLoader arffLoader = (ArffLoader)loader.getLoader();
        // setup operation goes here
      } else if(className.equalsIgnoreCase(CSVLoader.class.getName())) {
        CSVLoader csvLoader = (CSVLoader)loader.getLoader();
        // setup operation goes here        
      }

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    private Instances loadInstancesFromARFF(String filename, String className) throws IOException {
        File file = new File(TEST_RESOURCES, filename);
        assertTrue(file.exists());


        ArffLoader loader = new ArffLoader();
        loader.setFile(file);
        Instances insts = loader.getDataSet();
        Attribute classAttribute = insts.attribute(className);
        insts.setClass(classAttribute);
        return insts;
    }

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