cohorts['CohortPeriod']=cohortperiod
cohorts.head(20)
| FirstOrder | OrderPeriod | TotalUsers | CohortPeriod | |
|---|---|---|---|---|
| 0 | 2009-01 | 2009-01 | 22.0 | 0 |
| 1 | 2009-01 | 2009-02 | 8.0 | 1 |
| 2 | 2009-01 | 2009-03 | 10.0 | 2 |
| 3 | 2009-01 | 2009-04 | 9.0 | 3 |
| 4 | 2009-01 | 2009-05 | 10.0 | 4 |
| 5 | 2009-01 | 2009-06 | 8.0 | 5 |
| 6 | 2009-01 | 2009-07 | 8.0 | 6 |
| 7 | 2009-01 | 2009-08 | 7.0 | 7 |
| 8 | 2009-01 | 2009-09 | 7.0 | 8 |
| 9 | 2009-01 | 2009-10 | 7.0 | 9 |
| 10 | 2009-01 | 2009-11 | 7.0 | 10 |
| 11 | 2009-01 | 2009-12 | 8.0 | 11 |
| 12 | 2009-01 | 2010-01 | 11.0 | 12 |
| 13 | 2009-01 | 2010-02 | 7.0 | 13 |
| 14 | 2009-01 | 2010-03 | 6.0 | 14 |
| 15 | 2009-02 | 2009-02 | 15.0 | 0 |
| 16 | 2009-02 | 2009-03 | 3.0 | 1 |
| 17 | 2009-02 | 2009-04 | 5.0 | 2 |
| 18 | 2009-02 | 2009-05 | 1.0 | 3 |
| 19 | 2009-02 | 2009-06 | 4.0 | 4 |