Rolling Average Calculation
I have a set of monthly data and would like to calculate a 3-month rolling average. For example: Jan = 30 Feb = 32 Mar = 34 April = 36 Rolling average for March would be 32 ((30+32+34)/3), for April would be 34 ((32+34+36)/3). It is probably something fairly simple, but I'd appreciate your help. Thank you.
