Dear Statalist,
I have a problem related to counting. I have tried to find similar topics on the forum but didn't find any. In the following example, I would like to find whether event 1 and 2 happen at similar time (related). If in company 1, event A takes place on 25-Apr-06 (obs. 5), I would like to count the number of event B happens within 30 days before or after the date of event A. In this example, obs. 6 satisfies the condition. Obs. 4 does not fit since it is also event A. Obs. 8 does not fit since it is with another company. So for obs. 5, the number of related obs. should be 1.
I am puzzled about how to use observation value as count criteria. And how to record count results?
Any help would be much appreciated. Many thanks in advance.
Yang
I have a problem related to counting. I have tried to find similar topics on the forum but didn't find any. In the following example, I would like to find whether event 1 and 2 happen at similar time (related). If in company 1, event A takes place on 25-Apr-06 (obs. 5), I would like to count the number of event B happens within 30 days before or after the date of event A. In this example, obs. 6 satisfies the condition. Obs. 4 does not fit since it is also event A. Obs. 8 does not fit since it is with another company. So for obs. 5, the number of related obs. should be 1.
| Obs | company | event A | event B | n_related? | date |
| 1 | 1 | 1 | 0 | 12-Dec-05 | |
| 2 | 1 | 0 | 1 | 23-Dec-05 | |
| 3 | 1 | 1 | 0 | 24-Feb-06 | |
| 4 | 1 | 1 | 0 | 29-Mar-06 | |
| 5 | 1 | 1 | 0 | 25-Apr-06 | |
| 6 | 1 | 0 | 1 | 20-May-06 | |
| 7 | 1 | 0 | 1 | 1-Jun-06 | |
| 8 | 2 | 0 | 1 | 23-Apr-06 | |
| 9 | 2 | 1 | 0 | 26-Jul-06 | |
| 10 | 2 | 0 | 1 | 25-Aug-06 | |
| 11 | 2 | 0 | 1 | 25-Sep-06 | |
| 12 | 2 | 1 | 0 | 25-Oct-06 | |
| 13 | 2 | 0 | 1 | 25-Oct-06 | |
| 14 | 2 | 1 | 0 | 24-Nov-06 |
Any help would be much appreciated. Many thanks in advance.
Yang