|
|---|
|
|
|
|
|
g*******t
发帖数: 124 | 1 The following SAS program is submitted:
data work.empsalary;
set work.people (in = inemp)
work.money (in = insal);
if insal and inemp;
run;
The SAS data set WORK.PEOPLE has 5 observations, and the data set WORK.MONEY
has 7 observations.
How many observations will the data set WORK.EMPSALARY contain?
A. 0
B. 5
C. 7
D. 12
=>The answer is A, I ran SAS and it is A. I don't understand. For concanetin
g data, isn't everything in the combined data file? Why isn't it 12? | l***a
发帖数: 12410 | 2 it's stacking.
MONEY
【在 g*******t 的大作中提到】
: The following SAS program is submitted:
: data work.empsalary;
: set work.people (in = inemp)
: work.money (in = insal);
: if insal and inemp;
: run;
: The SAS data set WORK.PEOPLE has 5 observations, and the data set WORK.MONEY
: has 7 observations.
: How many observations will the data set WORK.EMPSALARY contain?
: A. 0
| g*******t
发帖数: 124 | 3 what does that mean?
【在 l***a 的大作中提到】
: it's stacking.
:
: MONEY
| g*******y
发帖数: 380 | 4 stacking就是concatenate的意思.
注意里面用的是set,不是merge.
【在 g*******t 的大作中提到】
: what does that mean?
|
|
|
|
|
|
|
|
