需要的结果是
comid | year | personid | pid | y |
1 | 2001 | 1 | 30 | 30 |
1 | 2001 | 2 | 32 | 32 |
1 | 2001 | 3 | 0 | 0 |
1 | 2001 | 4 | 30 | 30 |
1 | 2002 | 1 | 30 | 0 |
1 | 2002 | 3 | 0 | 0 |
1 | 2002 | 4 | 30 | 0 |
1 | 2002 | 5 | 37 | 1 |
1 | 2002 | 6 | 32 | 0 |
2 | 2001 | 1 | 37 | 1 |
2 | 2001 | 2 | 32 | 0 |
2 | 2001 | 3 | 0 | 0 |
2 | 2001 | 4 | 30 | 0 |
2 | 2002 | 1 | 30 | 30 |
2 | 2002 | 3 | 0 | 0 |
2 | 2002 | 4 | 30 | 30 |
2 | 2002 | 5 | 32 | 32 |
2 | 2002 | 6 | 32 | 32 |
即如果pid中出现37,则除了该数据变为1外,该公司整年的其他观测都为0;如果不出现37,则保留原数值。谢谢大家!