Esempio n. 1
0
  /**
   * Returns a description of the classifier.
   *
   * @return a description of the classifier as a string.
   */
  public String toString() {

    if (m_entries == null) {
      return "Decision Table: No model built yet.";
    } else {
      StringBuffer text = new StringBuffer();

      text.append(
          "Decision Table:"
              + "\n\nNumber of training instances: "
              + m_numInstances
              + "\nNumber of Rules : "
              + m_entries.size()
              + "\n");

      if (m_useIBk) {
        text.append("Non matches covered by IB1.\n");
      } else {
        text.append("Non matches covered by Majority class.\n");
      }

      text.append(m_search.toString());
      /*text.append("Best first search for feature set,\nterminated after "+
      m_maxStale+" non improving subsets.\n"); */

      text.append("Evaluation (for feature selection): CV ");
      if (m_CVFolds > 1) {
        text.append("(" + m_CVFolds + " fold) ");
      } else {
        text.append("(leave one out) ");
      }
      text.append("\nFeature set: " + printFeatures());

      if (m_displayRules) {

        // find out the max column width
        int maxColWidth = 0;
        for (int i = 0; i < m_dtInstances.numAttributes(); i++) {
          if (m_dtInstances.attribute(i).name().length() > maxColWidth) {
            maxColWidth = m_dtInstances.attribute(i).name().length();
          }

          if (m_classIsNominal || (i != m_dtInstances.classIndex())) {
            Enumeration e = m_dtInstances.attribute(i).enumerateValues();
            while (e.hasMoreElements()) {
              String ss = (String) e.nextElement();
              if (ss.length() > maxColWidth) {
                maxColWidth = ss.length();
              }
            }
          }
        }

        text.append("\n\nRules:\n");
        StringBuffer tm = new StringBuffer();
        for (int i = 0; i < m_dtInstances.numAttributes(); i++) {
          if (m_dtInstances.classIndex() != i) {
            int d = maxColWidth - m_dtInstances.attribute(i).name().length();
            tm.append(m_dtInstances.attribute(i).name());
            for (int j = 0; j < d + 1; j++) {
              tm.append(" ");
            }
          }
        }
        tm.append(m_dtInstances.attribute(m_dtInstances.classIndex()).name() + "  ");

        for (int i = 0; i < tm.length() + 10; i++) {
          text.append("=");
        }
        text.append("\n");
        text.append(tm);
        text.append("\n");
        for (int i = 0; i < tm.length() + 10; i++) {
          text.append("=");
        }
        text.append("\n");

        Enumeration e = m_entries.keys();
        while (e.hasMoreElements()) {
          DecisionTableHashKey tt = (DecisionTableHashKey) e.nextElement();
          text.append(tt.toString(m_dtInstances, maxColWidth));
          double[] ClassDist = (double[]) m_entries.get(tt);

          if (m_classIsNominal) {
            int m = Utils.maxIndex(ClassDist);
            try {
              text.append(m_dtInstances.classAttribute().value(m) + "\n");
            } catch (Exception ee) {
              System.out.println(ee.getMessage());
            }
          } else {
            text.append((ClassDist[0] / ClassDist[1]) + "\n");
          }
        }

        for (int i = 0; i < tm.length() + 10; i++) {
          text.append("=");
        }
        text.append("\n");
        text.append("\n");
      }
      return text.toString();
    }
  }
Esempio n. 2
0
 /**
  * Returns the number of rules
  *
  * @return the number of rules
  */
 public double measureNumRules() {
   return m_entries.size();
 }