04/01北美,只看了70+50+123,花了三天左右,其中看到四五道新题,两道记得比较清楚,多谢更正~
1. 如下有几个是valid SAS data set name:
_2Test
-2Test
Work.data
Data
2Test
(A)4 (B)3 (C)2 (D)1
2.数据中有 SAS data variable: old_var, 如03Feb2000,如何将此数据改为文字式,如February 03,2000:
A new_var=input (old_var, worddate20.)
B new_var=input (old_var, date9., worddate20.)
C new_var=put (old_var, worddate20.)
D new_var=put (old_var, date9., worddate20.)