private TreeMap<Float, Float> makeListFromPointInArray(
			TreeMap<Float, float[]> coData, int id) {

		TreeMap<Float, Float> pts = new TreeMap<Float, Float>();
		for (Entry<Float, float[]> data : coData.entrySet()) {

			pts.put(data.getKey(), data.getValue()[id]);
		}
		return pts;
	}