public static DefaultCategoryDataset createDataset(Population pop) {
		DefaultCategoryDataset linedataset = new DefaultCategoryDataset();
		CycleHistory[] history = pop.getHistory();
		for(int i=0;i<history.length;i++) {
			for(int j=0;j<10;j++) {
				String sss = (j<5? "Star" : "Plain")+new Integer(j%5+1).toString();
				linedataset.addValue(history[i].getHistory()[j], sss, new Integer(i).toString());
			}
		}
		return linedataset;
	}