private void init() {
		assert !fullStatCalc;
				
		int ncount = aggGraph.getNodeCount();
		for (int i=0; i<ncount; i++) {
			for (int j=i+1; j<ncount; j++) {
				AggGraph.AggNode fromNode = aggGraph.getNode(i);
				AggGraph.AggNode toNode = aggGraph.getNode(j);
				AggGraph.AggEdge edge = fromNode.getConnectingEdge(toNode);
				
				if (edge == null) continue;
				
				TemporalChange tc = getTemporalChange(edge);
				
				if (tc.size() <= 0) continue;
				
				reflectStat(tc);
				updateUnfilteredTemporalChange(edge);
			}
		}
		
		fullStatCalc = true;
	}