Instances data = new Instances(instances);
Instances data = instances;
    private Instances computeInfoGain(Instances instances, double defAcRt, 				      Antd antd){      Instances data = new Instances(instances);	          /* Split the data into bags.	 The information gain of each bag is also calculated in this procedure */      Instances[] splitData = antd.splitData(data, defAcRt, 					     m_Consequent); 	          /* Get the bag of data to be used for next antecedents */      if(splitData != null)	return splitData[(int)antd.getAttrValue()];      else return null;    }