Nick Cox
2020-12-09 02:15:48
moss来自SSC的专门致力于这个问题。如果“本地”排除社区贡献的命令，那么你需要编写自己的代码。
clear all
input x str20 y
1 "123 12"
2 "345 678"
3 "000 000 000"
4 "111"
5 "00"
end
moss y, match("([0-9][0-9][0-9])") regex
list
+--------------------------------------------------------------------------------+
| x y _count _match1 _pos1 _match2 _pos2 _match3 _pos3 |
|--------------------------------------------------------------------------------|
1. | 1 123 12 1 123 1 . . |
2. | 2 345 678 2 345 1 678 5 . |
3. | 3 000 000 000 3 000 1 000 5 000 9 |
4. | 4 111 1 111 1 . . |
5. | 5 00 0 . . . |
+--------------------------------------------------------------------------------+
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