temp.append("\nNumber of iterations: " + m_Iterations+"\n");
  public String toString() {    StringBuffer temp = new StringBuffer();    temp.append("\nkMeans\n======\n");    temp.append("\nCluster centroids:\n");    for (int i = 0; i < m_NumClusters; i++) {      temp.append("\nCluster "+i+"\n\t");      for (int j = 0; j < m_ClusterCentroids.numAttributes(); j++) {	if (m_ClusterCentroids.attribute(j).isNominal()) {	  temp.append(" "+m_ClusterCentroids.attribute(j).		      value((int)m_ClusterCentroids.instance(i).value(j)));	} else {	  temp.append(" "+m_ClusterCentroids.instance(i).value(j));	}      }    }    return temp.toString();  }