if (m_data.classIndex() >= 0) { m_colorAttrib.setSelectedIndex(m_data.classIndex()); }
  public void setInstances(Instances newins) {    attribIndex = 0;    m_data = newins;    as=null;    m_colorAttrib.removeAllItems();    for(int i=0; i<m_data.numAttributes(); i++) {      m_colorAttrib.addItem(new String("Colour: "+m_data.attribute(i).name()+" "+				       ((m_data.attribute(i).isNominal()) ? "(Nom)":"(Num)")));    }    m_colorAttrib.setSelectedIndex(m_data.numAttributes()-1);      classIndex = m_data.numAttributes()-1;        this.repaint();  }