Hello,
I need your help to make a calculation based on previous rows and specific filters .
| cars | ||
| S | A | 0 |
| S | A | 1 |
| S | A | 0 |
| S | A | 2 |
| S | A | 1 |
| S | A | 2 |
| S | B | 0 |
| S | B | 0 |
| S | B | 1 |
| Z | C | 0 |
| Z | C | 2 |
How many cars for A/B/C ? i need formulas using language M in order to use it in data view to return new numerical formulas to be used on future columns.