我有以下数据：
CID CATID PRI11A PRI12A PRI16A PRI17A PRI11B PRI12B PRI16B PRI17B
583234 1 499 633 450 234 995 628 494 639
583820 1 564 987 463 235 432 124 658 54
583820 2 357 786 129 325 98 79 956 453
当我运行命令时：
reshape long PRI, i(CID CATID) j(IDS PRI)
数据变化如下：
CID CATID IDS PRI11A PRI12A PRI16A PRI17A PRI11B PRI12B PRI16B PRI17B PRI
583234 1 PRI 499 633 450 234 995 628 494 639 .
583820 1 PRI 564 987 463 235 432 124 658 54 .
583820 2 PRI 357 786 129 325 98 79 956 453 .
但是，我想为CID的所有值重塑数据：
CID CATID IDS IDPRI PRI
583234 1 A 11 499
583234 1 A 12 633
583234 1 A 16 450
583234 1 A 17 234
583234 1 B 11 995
583234 1 B 12 628
583234 1 B 16 494
583234 1 B 17 639
如何使用reshape来做到这一点？
答案 0 :(得分：2)
使用示例数据：
clear
input CID CATID PRI11A PRI12A PRI16A PRI17A PRI11B PRI12B PRI16B PRI17B
583234 1 499 633 450 234 995 628 494 639
583820 1 564 987 463 235 432 124 658 54
583820 2 357 786 129 325 98 79 956 453
end
list, sepby(CID)
+----------------------------------------------------------------------------------------+
| CID CATID PRI11A PRI12A PRI16A PRI17A PRI11B PRI12B PRI16B PRI17B |
|----------------------------------------------------------------------------------------|
1. | 583234 1 499 633 450 234 995 628 494 639 |
|----------------------------------------------------------------------------------------|
2. | 583820 1 564 987 463 235 432 124 658 54 |
3. | 583820 2 357 786 129 325 98 79 956 453 |
+----------------------------------------------------------------------------------------+
您首先需要reshape long作为PRI的后缀（IDS）：
reshape long PRI11 PRI12 PRI16 PRI17, i(CID CATID) j(IDS "A" "B")
list, sepby(CID)
+------------------------------------------------------+
| CID CATID IDS PRI11 PRI12 PRI16 PRI17 |
|------------------------------------------------------|
1. | 583234 1 A 499 633 450 234 |
2. | 583234 1 B 995 628 494 639 |
|------------------------------------------------------|
3. | 583820 1 A 564 987 463 235 |
4. | 583820 1 B 432 124 658 54 |
5. | 583820 2 A 357 786 129 325 |
6. | 583820 2 B 98 79 956 453 |
+------------------------------------------------------+
然后再次reshape long PRI：
reshape long PRI, i(CID CATID IDS) j(IDPRI)
list, sepby(CID)
+------------------------------------+
| CID CATID IDS IDPRI PRI |
|------------------------------------|
1. | 583234 1 A 11 499 |
2. | 583234 1 A 12 633 |
3. | 583234 1 A 16 450 |
4. | 583234 1 A 17 234 |
5. | 583234 1 B 11 995 |
6. | 583234 1 B 12 628 |
7. | 583234 1 B 16 494 |
8. | 583234 1 B 17 639 |
|------------------------------------|
9. | 583820 1 A 11 564 |
10. | 583820 1 A 12 987 |
11. | 583820 1 A 16 463 |
12. | 583820 1 A 17 235 |
13. | 583820 1 B 11 432 |
14. | 583820 1 B 12 124 |
15. | 583820 1 B 16 658 |
16. | 583820 1 B 17 54 |
17. | 583820 2 A 11 357 |
18. | 583820 2 A 12 786 |
19. | 583820 2 A 16 129 |
20. | 583820 2 A 17 325 |
21. | 583820 2 B 11 98 |
22. | 583820 2 B 12 79 |
23. | 583820 2 B 16 956 |
24. | 583820 2 B 17 453 |
+------------------------------------+