Examples of weka.core.converters.CSVLoader

weka.core.converters.CSVLoader

Reads a source that is in comma separated format (the default). One can also change the column separator from comma to tab or another character. Assumes that the first row in the file determines the number of and names of the attributes.

Valid options are:

 -N <range> The range of attributes to force type to be NOMINAL. 'first' and 'last' are accepted as well. Examples: "first-last", "1,4,5-27,50-last" (default: -none-)

 -S <range> The range of attribute to force type to be STRING. 'first' and 'last' are accepted as well. Examples: "first-last", "1,4,5-27,50-last" (default: -none-)

 -D <range> The range of attribute to force type to be DATE. 'first' and 'last' are accepted as well. Examples: "first-last", "1,4,5-27,50-last" (default: -none-)

 -format <date format> The date formatting string to use to parse date values. (default: "yyyy-MM-dd'T'HH:mm:ss")

 -M <str> The string representing a missing value. (default: ?)

 -F <separator> The field separator to be used. '\t' can be used as well. (default: ',')

@author Mark Hall (mhall@cs.waikato.ac.nz) @version $Revision: 7096 $ @see Loader

  Reader r = new BufferedReader(new FileReader(f));
  setInstances(new Instances(r));
  r.close();
      } else if (f.getName().toLowerCase().endsWith(CSVLoader.FILE_EXTENSION)) {
  fileType = "csv";
  CSVLoader cnv = new CSVLoader();
  cnv.setSource(f);
  Instances inst = cnv.getDataSet();
  setInstances(inst);
      } else {
  throw new Exception(Messages.getInstance().getString("ResultsPanel_SetInstancesFromFile_Error_Text"));
      }
    } catch (Exception ex) {

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    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");
    }
    else {
      buffer.append("  Loader type: Unknown" + "\n");
    }

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        }
      } 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        
      }    
    }
    logger.debug("OUT");
  }

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      System.exit(-1);
    }
    try {
      Instances insts = null;
      if (args[0].endsWith(".csv")) {
        CSVLoader csv = new CSVLoader();
        csv.setFile(new File(args[0]));
        insts = csv.getDataSet();
      } else {
        insts = new Instances(new BufferedReader(new FileReader(args[0])));
      }


      CoverTree tree = new CoverTree();

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  Reader r = new BufferedReader(new FileReader(f));
  setInstances(new Instances(r));
  r.close();
      } else if (f.getName().toLowerCase().endsWith(CSVLoader.FILE_EXTENSION)) {
  fileType = "csv";
  CSVLoader cnv = new CSVLoader();
  cnv.setSource(f);
  Instances inst = cnv.getDataSet();
  setInstances(inst);
      } else {
  throw new Exception("Unrecognized file type");
      }
    } catch (Exception ex) {

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     * 
     * @throws IOException
     * @return the set of instances read
     */
    public Instances readFromCSV() throws IOException {
        CSVLoader loader = new CSVLoader();
        loader.setSource(new File(_filename));
        _instances = loader.getDataSet();
        return _instances;
    }

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    }


    public static Instances load(String csvFile) throws IOException {
        // load CSV
        System.out.println("Loading CSV dataset");
        CSVLoader loader = new MyCSVLoader();
        loader.setFieldSeparator("\\t");
        loader.setSource(new File(csvFile));
        Instances data = loader.getDataSet();
        return data;
    }

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  Reader r = new BufferedReader(new FileReader(f));
  setInstances(new Instances(r));
  r.close();
      } else if (f.getName().toLowerCase().endsWith(CSVLoader.FILE_EXTENSION)) {
  fileType = "csv";
  CSVLoader cnv = new CSVLoader();
  cnv.setSource(f);
  Instances inst = cnv.getDataSet();
  setInstances(inst);
      } else {
  throw new Exception("Unrecognized file type");
      }
    } catch (Exception ex) {

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      System.exit(-1);
    }
    try {
      Instances insts = null;
      if (args[0].endsWith(".csv")) {
        CSVLoader csv = new CSVLoader();
        csv.setFile(new File(args[0]));
        insts = csv.getDataSet();
      } else {
        insts = new Instances(new BufferedReader(new FileReader(args[0])));
      }


      CoverTree tree = new CoverTree();

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        return fileNameString;
    }


    private boolean convertCSVtoARFF(String input, String output) throws  Exception{
    // load CSV
    CSVLoader loader = new CSVLoader();
    loader.setSource(new File(input));
    Instances data = loader.getDataSet();


    // save ARFF
    ArffSaver saver = new ArffSaver();
    saver.setInstances(data);
    saver.setFile(new File(output));

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