就是看看每个code每年每月 变量 m的中位数 均值 最大值 最小值 在25百分位的数 (将每个code每年每月对应的m从小到大排序后,最靠近25%分位上的那个数,或者再复杂一点如果本来就10个数,那就用排序后的第20%上的数与第30%上面的数做平均) med中位数已经给出 。 最好用data步吧
谢谢各位大侠啊
| code | year | month | m | med | mean | min | max | p25 | p75 |
| 1 | 1997 | 1 | 1 | 5 | | | | | |
| 1 | 1997 | 1 | 2 | 5 | | | | | |
| 1 | 1997 | 1 | 3 | 5 | | | | | |
| 1 | 1997 | 1 | 4 | 5 | | | | | |
| 1 | 1997 | 1 | 5 | 5 | | | | | |
| 1 | 1997 | 1 | 6 | 5 | | | | | |
| 1 | 1997 | 1 | 7 | 5 | | | | | |
| 1 | 1997 | 1 | 8 | 5 | | | | | |
| 1 | 1997 | 1 | 9 | 5 | | | | | |
| 1 | 1997 | 2 | 3 | 4 | | | | | |
| 1 | 1997 | 2 | 2 | 4 | | | | | |
| 1 | 1997 | 2 | 5 | 4 | | | | | |
| 1 | 1997 | 2 | 8 | 4 | | | | | |
| 2 | 1998 | 1 | 1 | 5 | | | | | |
| 2 | 1998 | 1 | 2 | 5 | | | | | |
| 2 | 1998 | 1 | 3 | 5 | | | | | |
| 2 | 1998 | 1 | 4 | 5 | | | | | |
| 2 | 1998 | 1 | 5 | 5 | | | | | |
| 2 | 1998 | 1 | 6 | 5 | | | | | |
| 2 | 1998 | 1 | 7 | 5 | | | | | |
| 2 | 1998 | 1 | 8 | 5 | | | | | |
| 2 | 1998 | 1 | 9 | 5 | | | | | |
| 2 | 1998 | 2 | 3 | 4 | | | | | |
| 2 | 1998 | 2 | 2 | 4 | | | | | |
| 2 | 1998 | 2 | 5 | 4 | | | | | |
| 2 | 1998 | 2 | 8 | 4 | | | | | |