t**g
发帖数: 1164 | 1 1。KEEP跟RETAIN语句有啥区别啊？
我的回答是
当sas读入下一轮数据的时候
retain的变量会保存当前值
而keep的变量则会重置？
2。MEAN函数跟MEAN proc有啥区别阿？
我的回答是mean function会自动忽略missing值
而prco mean不会？
谢谢 |
A*******s
发帖数: 3942 | 2 Are these interview questions?
I dont think the interviewer knows anything about SAS...
【在 t**g 的大作中提到】
: 1。KEEP跟RETAIN语句有啥区别啊？
: 我的回答是
: 当sas读入下一轮数据的时候
: retain的变量会保存当前值
: 而keep的变量则会重置？
: 2。MEAN函数跟MEAN proc有啥区别阿？
: 我的回答是mean function会自动忽略missing值
: 而prco mean不会？
: 谢谢
|
s*r
发帖数: 2757 | 3 one function of a statistician is to figure out what the confusion part is
and to explain complex ideas to others
【在 A*******s 的大作中提到】
: Are these interview questions?
: I dont think the interviewer knows anything about SAS...
|
g**r
发帖数: 425 | 4 Do you mean the interviewee?
I think they are fair questions to ask.
【在 A*******s 的大作中提到】
: Are these interview questions?
: I dont think the interviewer knows anything about SAS...
|
A*******s
发帖数: 3942 | 5 well, i think it is normal to ask questions like "when do you use retain/
keep statement" ... But the question here was like "how do you compare a car
with a spoon?"
Anyway, maybe that's because i don't have much experience on that kind of
interview questions... Or maybe the interviewer just assumes LZ is a very
beginner... Too bad he's right...
【在 g**r 的大作中提到】
: Do you mean the interviewee?
: I think they are fair questions to ask.
|
s**********e
发帖数: 63 | 6 Depends on the data sets and the scenarior. |
t**g
发帖数: 1164 | 7 服了
re了快10篇
就没人能真正能回答我的问题的？
car
【在 A*******s 的大作中提到】
: well, i think it is normal to ask questions like "when do you use retain/
: keep statement" ... But the question here was like "how do you compare a car
: with a spoon?"
: Anyway, maybe that's because i don't have much experience on that kind of
: interview questions... Or maybe the interviewer just assumes LZ is a very
: beginner... Too bad he's right...
|
s*r
发帖数: 2757 | 8
car
both of them can be made of steel or plastic
【在 A*******s 的大作中提到】
: well, i think it is normal to ask questions like "when do you use retain/
: keep statement" ... But the question here was like "how do you compare a car
: with a spoon?"
: Anyway, maybe that's because i don't have much experience on that kind of
: interview questions... Or maybe the interviewer just assumes LZ is a very
: beginner... Too bad he's right...
|
g**r
发帖数: 425 | 9 您这两个问题的回答，大家都不好意思给您指出来怎么错了，我来做这个坏人吧。
KEEP是告诉你你的DATA要保留多少列的。
RETAIN是在运行中，对于这个VARIABLE SAS先把这行的值保留下来，对下一行计算时，
还用这个值。所以这两个一个是行的概念一个是列的概念。
PROC MEANS是用来做一个VARIABLE（列）的均值的。
MEAN函数是用来求在一行内几个函数的均值的。
【在 t**g 的大作中提到】
: 服了
: re了快10篇
: 就没人能真正能回答我的问题的？
:
: car
|
