M******f 发帖数: 92 | 1 有两道70题中的问题想请教大侠们。先谢谢各位。
#18. Which statement describes a characteristic of the SAS automatic
variable _ERROR_?
A. The _ERROR_ variable maintains a count of the number of data errors in a
DATA step.
B. The _ERROR_variable is added to the program data vector and becomes part
of the data set being created.
C. The _ERROR_ variable can be used in experessions in the DATA step.
D. The _ERROR_ variable contains the number of the observation that caused
the data error.
我觉得A和C都有可能。
另外,第15题也很类似。
#15. Whic |
t**c 发帖数: 539 | 2 #18应该是C。
A不对是因为_ERROR_只是表明有错还是没错,=1有错,=0 没错。而不是count the
number of error. |
J******d 发帖数: 287 | 3 #18,A不对。_ERROR_只有1和0,没法记录有多少errors.
#15,我选了D.不是很确定。书上好像说了Error被drop了。
a
part
【在 M******f 的大作中提到】 : 有两道70题中的问题想请教大侠们。先谢谢各位。 : #18. Which statement describes a characteristic of the SAS automatic : variable _ERROR_? : A. The _ERROR_ variable maintains a count of the number of data errors in a : DATA step. : B. The _ERROR_variable is added to the program data vector and becomes part : of the data set being created. : C. The _ERROR_ variable can be used in experessions in the DATA step. : D. The _ERROR_ variable contains the number of the observation that caused : the data error.
|
M******f 发帖数: 92 | |