[程式] SAS 請問如何讓欄位等於上一欄位的值
[軟體程式類別]:
SAS
[程式問題]:
資料處理
[軟體熟悉度]:
低(1~3個月)
[問題敘述]:
小弟原先想寫的語法為
Data xxx;
Set xxx;
If ID=lag(ID) and overconfidence=lag(overconfidence) then over confidence=1;
Run;
白話來說，如果某人某年overconfidence欄位為1，那麼該人往後overconfidence欄位皆
為1
目前表格為
Year ID overconfidence
1991 A .
1992 A .
1993 A 1
1994 A .
1995 A .
1992 B .
1993 B 1
1994 B .
1995 B .
結果應像下表
Year ID overconfidence
1991 A 0
1992 A 0
1993 A 1
1994 A 1
1995 A 1
1992 B 0
1993 B 1
1994 B 1
1995 B 1
請各位協助，感謝
[程式範例]:
同上
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