Howdy!
I have a question: my weekly dataset has to be split over 3 columns; the first 13 weeks in column Quarter, de next 13 in Quarter+1 and the next in Quarter+2, the following 13 has to end-up in column Quarter. So Q1'14 = Quarter, Q2'14 = Quarter +1, Q3'14 in Quarter+2, and Q4'14 in...