title: How can I forecast a 2000 vehicles engine hours separately using R language?
body: <p>machines: m1, m2, m3,... m2000
  date:    2016, 2016, 2016...2016
  engine hours: 200, 300, 30,....700.
  Think each machine has some 200 rows of data in 2016, how can I forecast engine hours for 2017 for all 2000 machines.</p>