private int[] getCampusDistributionData() {
		CourseList model = super.getModel();
		campusDistribution.clear();
		CourseOffering[] offerings = model.getSelectedCoursesOfferings();
		String campus = null;
		for(int i = 0; i < offerings.length; i++) {
			campus = offerings[i].getLocation().toUpperCase();
			if(campus.equals("BURNABY")) {
				campusDistribution.add(0);
			} else if(campus.equals("SURREY")) {
				campusDistribution.add(1);
			} else if(campus.equals("HRBRCNTR")) {
				campusDistribution.add(2);
			} else {
				campusDistribution.add(3);
			}
		}
		return convertData(campusDistribution);
	}