Esempio n. 1
0
  /**
   * Parses a given list of options. Valid options are:
   *
   * <p>-D <br>
   * Turn on debugging output.
   *
   * <p>-S seed <br>
   * Random number seed (default 1).
   *
   * <p>-B classifierstring <br>
   * Classifierstring should contain the full class name of a scheme included for selection followed
   * by options to the classifier (required, option should be used once for each classifier).
   *
   * <p>-X num_folds <br>
   * Use cross validation error as the basis for classifier selection. (default 0, is to use error
   * on the training data instead)
   *
   * <p>
   *
   * @param options the list of options as an array of strings
   * @exception Exception if an option is not supported
   */
  public void setOptions(String[] options) throws Exception {

    setDebug(Utils.getFlag('D', options));

    String numFoldsString = Utils.getOption('X', options);
    if (numFoldsString.length() != 0) {
      setNumFolds(Integer.parseInt(numFoldsString));
    } else {
      setNumFolds(0);
    }

    String randomString = Utils.getOption('S', options);
    if (randomString.length() != 0) {
      setSeed(Integer.parseInt(randomString));
    } else {
      setSeed(1);
    }

    // Iterate through the schemes
    FastVector classifiers = new FastVector();
    while (true) {
      String classifierString = Utils.getOption('B', options);
      if (classifierString.length() == 0) {
        break;
      }
      String[] classifierSpec = Utils.splitOptions(classifierString);
      if (classifierSpec.length == 0) {
        throw new Exception("Invalid classifier specification string");
      }
      String classifierName = classifierSpec[0];
      classifierSpec[0] = "";
      classifiers.addElement(Classifier.forName(classifierName, classifierSpec));
    }
    if (classifiers.size() <= 1) {
      throw new Exception("At least two classifiers must be specified" + " with the -B option.");
    } else {
      Classifier[] classifiersArray = new Classifier[classifiers.size()];
      for (int i = 0; i < classifiersArray.length; i++) {
        classifiersArray[i] = (Classifier) classifiers.elementAt(i);
      }
      setClassifiers(classifiersArray);
    }
  }
Esempio n. 2
0
 /**
  * Tests if there are any more elements to enumerate.
  *
  * @return true if there are some elements left
  */
 public final boolean hasMoreElements() {
   return m_Counter < m_Vector.size();
 }
Esempio n. 3
0
  /**
   * Appends all elements of the supplied vector to this vector.
   *
   * @param toAppend the FastVector containing elements to append.
   */
  public final void appendElements(FastVector toAppend) {

    setCapacity(size() + toAppend.size());
    System.arraycopy(toAppend.m_Objects, 0, m_Objects, size(), toAppend.size());
    m_Size = m_Objects.length;
  }