void initFromArffFile(String sFileName) {
		try {
			Instances instances = new Instances(new FileReader(sFileName));
			m_BayesNet = new EditableBayesNet(instances);
			m_Instances = instances;
			a_learn.setEnabled(true);
			a_learnCPT.setEnabled(true);
			setAppropriateNodeSize();
			setAppropriateSize();
		} catch (Exception ex) {
			ex.printStackTrace();
			return;
		}
	}