Sun, 25 Apr 2010 22:50:47 +0200 wenzelm more systematic treatment of data -- avoid slightly odd nested tuples here;
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -1 +1 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip