Sun, 01 Oct 2017 11:58:27 +0100 Yuya Nishihara extdata: just use iterator to read lines one by one
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -1 +1 +10 +30 +100 +300 +1000 +3000 +10000 tip