m_Ranges = ranges;
  public double [][] initializeRanges() throws Exception {        if(m_Data == null) {      throw new Exception("No instances supplied.");    }        int numAtt = m_Data.numAttributes();    double [][] ranges = new double [numAtt][3];        if (m_Data.numInstances() <= 0) {      initializeRangesEmpty(numAtt, ranges);      return ranges;    }    else      // initialize ranges using the first instance      updateRangesFirst(m_Data.instance(0), numAtt, ranges);        // update ranges, starting from the second    for (int i = 1; i < m_Data.numInstances(); i++) {      updateRanges(m_Data.instance(i), numAtt, ranges);    }    m_Ranges = ranges;//    System.out.println("Initialized ranges");//    printRanges(m_Ranges);    return ranges;  }