y*****w
发帖数: 1350 | 1 Although I personally have never formally done time series analysis, I think
this is for sure a time series analysis rather than a longitudinal analysis
. The reasons are:
1) As everybody understands, this is a just one-person multivariate data
with autocorrelated error terms.
2) Longitudinal analysis and time series analysis have different temporal
dynamics. In a longitudinal study, time points are usually fixed and pre-
specified, for example blood pressure levels at 0, 2, 6, 12, 18, 24, 36
mo... 阅读全帖 |
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p*******r
发帖数: 1951 | 2 对于这一题我的理解是：首先，%let 定义 date 为一个 global macro variable。 然
后用一个 call symput 语句重新给date 赋值。这时候date 作为一个global macro
variable的值变为call symput赋予的值。
我觉得出这个题的目的只是考察全局宏变量定义，以及在macro内改变全局宏变量的值
对于全局宏变量的影响。而对于call symput定义macro variable的scope，需要更深一
步的解释。参见这个链接。
http://support.sas.com/documentation/cdl/en/mcrolref/61885/HTML
在这道题里面，就像上面的兄弟说的，因为macro two没有parameter，call symput定
义的date是全局宏变量。但就算macro two有parameter，call symput运行后全局宏变
量date 的值依然会被改变。
这个题目出的很好。 |
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P****D
发帖数: 11146 | 11 这个有若干种方法，wikipedia给了三种。
http://en.wikipedia.org/wiki/Spearman%27s_rank_correlation_coef
Determining significance
One approach to testing whether an observed value of ρ is significantly
different from zero (r will always maintain −1 ≤ r ≤ 1) is to
calculate the probability that it would be greater than or equal to the
observed r, given the null hypothesis, by using a permutation test.
Another approach parallels the use of the Fisher transformation in the case
of the Pearson product-moment c... 阅读全帖 |
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a******p
发帖数: 414 | 12 是的，我写的是survival的macro.
&trt是macro parameter
请看这个link:
http://support.sas.com/documentation/cdl/en/statug/65328/HTML/d
我的&trt是treatment, 可能是one two three 或更多arms
我在画survival plot后，在图的最下面treatment label: one three two.
我希望是one two three.
如果我想用option, order=internal，我需要把我的&trt先format ,然后在informat，
但我不知怎么把一个macro variable format 和 informat.
多谢！ |
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y*****w
发帖数: 1350 | 15 Because as I mentioned, SAS PROC POWER with the TWOSAMPLEWILCOXON statement
, which I used for the sample size calculation, has no NEGB option.
Actually I found I don't need PROC GENMOD in this context, because I found
that lognormal distribution better fits my data than Gamma distribution,
whereas PROC GENMOD does not have the lognormal option as a distribution. I
found the following SAS example using PROC UNIVARIATE very useful in that it
provides simple and straightforward statistics and gra... 阅读全帖 |
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d********t
发帖数: 837 | 18 Yeah right.
http://support.sas.com/documentation/cdl/en/lrcon/62955/HTML/de
By default, a simple DATA step iterates once for each observation that is
being created. The flow of action in the Execution Phase of a simple DATA
step is described as follows:
The DATA step begins with a DATA statement. Each time the DATA statement
executes, a new iteration of the DATA step begins, and the _N_ automatic
variable is incremented by 1.
SAS sets the newly created program variables to missing in the program... 阅读全帖 |
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a*****i
发帖数: 1045 | 20 create a new variable like group;
and rewrite the dataset, A=1,B=2,C=3,D=4,
and class group;
http://support.sas.com/documentation/cdl/en/statug/63033/HTML/d
maybe this can help.
data sas;
input group number;
cards;
1 1
1 2
1 4
1 6
1 3
1 6
1 7
2 2
2 3
2 5
2 3
3 1
3 8
3 2
3 1
3 7
3 2
4 4
4 7
4 3
4 2
;
proc glm data=sas;
class group;
model number=group;
means group/hovtest welch;
run; |
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m*********k
发帖数: 10521 | 23 [ebiz] goodevil
74923 goodevil Dec 6 ● 发300个包子，关于和 Desert110 的纠纷
成功奖励 10 伪币的用户: aaappp, o2, dragoninland, N007, usdan, xiaoguapi,
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daxigua001, yuki1010, aladding, pycn, Imit, wqhking, sarab, windloren,
hanshan, ... 阅读全帖 |
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p**q
发帖数: 1130 | 26 没研究过CDL
西西河上有个叫“七月群山”的就是开十八轮的，讲的故事很有意思
当然了，开十八轮，大多数时候肯定是无聊 |
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r*********g
发帖数: 5450 | 27 【 以下文字转载自 Family 讨论区 】
发信人: westjourney (随心如流水彷如行云 ), 信区: Family
标 题: 大妈有话说
发信站: BBS 未名空间站 (Wed Jul 9 15:21:05 2008), 转信
藤汪事件来说，我个人认为，小三是妓女也好，小三故意破坏婚姻也好，前LG无情无义
也好，都不重要，也不需追究。最重要的是藤的前LG不应该逃避他对小孩应该尽的责任
，付赡养费。就算再怎么讨厌藤，也不应该让自己的小孩没吃没穿，无法上学。。。所
以，我希望藤女士可以顺利解决此事，拿到自己应该得到的赡养费。
对于藤呢，虽然很多人不喜欢她这么闹。但在我看来，却是很有益的。至少她没有像
CDL一样去杀任何人，也没有用任何暴力行为解决这件事情。同时，我也相信她没有给
她的小孩灌输任何仇恨，但是小孩是很敏感的，当他看到自己的母亲是多么的不幸福，
他不会去怪自己的母亲，只会怪自己的父亲，因为他只知道这两个和他有关系的人，但
他也无能力改变什么，那种小孩的痛苦，我想很多人也无法了解，所以才会用语言来表
现自己的愤怒。我想藤女士以后会花不少精力来帮助她小孩健康的成长。 |
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