Rolling count with array formula in Google Sheets
问题 I have the dataset below. Col1 is given data and Col2 is the rolling count of the previous 5 rows of Col1 (inclusive). Date Col1 Col2 01/04/20 2 1 02/04/20 1 2 03/04/20 4 3 04/04/20 3 05/04/20 3 06/04/20 5 3 07/04/20 2 3 08/04/20 2 09/04/20 2 10/04/20 1 3 11/04/20 2 12/04/20 1 13/04/20 1 14/04/20 1 15/04/20 1 1 Is there a way to use arrayformula to do this rather than inputting a count formula into every cell in Col2 going down? 回答1: You can use Countifs with a condition on the rows: