private Instances makeCentersRandomly(Random random0,
protected Instances makeCentersRandomly(Random random0,
  private Instances makeCentersRandomly(Random random0,					Instances model,					int numClusters) {    Instances clusterCenters = new Instances(model, numClusters);    m_NumClusters = numClusters;    // makes the new centers randomly    for (int i = 0; i < numClusters; i++) {      int instIndex = Math.abs(random0.nextInt()) % m_Instances.numInstances();      clusterCenters.add(m_Instances.instance(instIndex));    }    return clusterCenters;  }