SAS

GEE model for difference over time?
I am have some drug usage prevalence for each year. I would like to compare the difference over time, using a multivariate model. So in 2007 I have lets say 10% usage in the population of a certain drug. In 2008 that decreases to 8%. I would like to determine the significance of that difference over the two yea... 23 Feb 2010 09:02

Wald chi-square
Hi, In logistic regression, why is wald-chi square used to interpret paremater estimate (coffeceints of regression) as in output below? What is Wald chi- square and how do I interpret this. I am aware that chi-square is used to test as a test of independence and goodness of fit. What does Wald chi- square repres... 23 Feb 2010 05:44

ods pdf speed performance issues
Hi all, Consider this construct: options pageno=1 nodate nonumber nocenter orientation=landscape noquotelenmax; goptions reset=all noborder ftext=Simplex htext=4 gunit=pct device=gif; ods _all_ close; ods pdf startpage=never notoc file=whatever.pdf'; ods escapechar="^"; SOME PROC GCH... 24 Feb 2010 13:07

Multicollinearity problem
Hi, I have 2 questions that are related to each other: 1. I have a set of measurement scales that are highly correlated with each other. I have tried to test the goodness-of-fit of my model using SEM and the Maximum Likelihood method. SEM analyses can be 'adversely' affected by multicollinearity. When I used ... 24 Feb 2010 19:58

SAS SQL subquery efficiency
Hi everyone, I'm trying to use a subquery to count past observations common to variables. However, I must be doing something wrong because I run out of disk space even though I have over 60 Go available! I have 3 variables in table1 (and > 1 million lines): DEAL_ID, DATE and CIE_ID. Since the same deal can i... 23 Feb 2010 00:15

STATEMENT AND SYNTAX for robust standard errors in Zero
> -----Original Message----- From: SAS(r) Discussion [mailto:SAS-L(a)LISTSERV.UGA.EDU] On Behalf Of Vishal Bali Sent: Monday, February 22, 2010 3:08 PM To: SAS-L(a)LISTSERV.UGA.EDU Subject: STATEMENT AND SYNTAX for robust standard errors in Zero inflated model I am using National Survey on Drug Use ... 22 Feb 2010 20:55

STATEMENT AND SYNTAX for robust standard errors in Zero inflated
I am using National Survey on Drug Use and Health (NSDUH) for my analysis. I have used Proc Genmod and Repeated Subject statement to obtain robust standard errors in Poisson and negative binomial regression It would be really helpful if somebody could please tell me about the STATEMENT AND SYNTAX to be used to ob... 22 Feb 2010 19:48

DDE not responding in SAS
Cherub DDE is a windows feature so I would be surprised that it could be disabled on a windows computer. What error messages are you receiving and does Excel open? It may be that the "non-dde" computer either has a different version of Excel installed or that the path to it is different. Nat Wooding -----Or... 22 Feb 2010 20:55

Macro Variable - Data _null_ statement - Help
move the %put after the RUN; should be working. the %put before RUN will be executed at the datastep complie time. at that time, the macro variables are not available yet. HTH Yu On Mon, Feb 22, 2010 at 2:31 PM, N Shah <nshah6(a)luc.edu> wrote: Thank you for your response in advance. filename readin... 23 Feb 2010 14:42

Re Spectral Analysis
Stan: SAS student: yes spectral analysis (should be effective)for < 10,000 samples. Mathworks: Yes for everything you can imagine and more. Cost about $0 2 week trial, $0 teacher, $100 student, $5000 up if not prior mentioned. Also try: http://www.cqoogle.com/ (not google.com) : spectral analysis software ... 22 Feb 2010 14:07