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 | |
