public void draw() { 
		Collections.sort(vals);
		
		try {
			PrintStream out = new PrintStream(new FileOutputStream("/tmp/cdf-" + name));
			for( int i=0; i<vals.size(); i++ ) {
				out.format("%3.16f %3.16f\n", (double)i / (double)vals.size(), Double.parseDouble(vals.get(i).toString())); 
			}
			out.flush();
			
		} catch( IOException e ) {
			e.printStackTrace();
		}
	}