About Dipanjan

Dipanjan · ‎06-06-2012

Hi I have a data of structure as 6 subjects each having 36 time point observations. Each of 6x36 rows have first column for a continuous response variable and the rest 3 columns for three continuous predictor variables. I need to build a model for each subject having different intercept but same slopes. Obviously there are issues of perfect link function, estimation method etc but those are of secondary interest. One way I found is to add 6 binary predictors for 6 subjects and run PROC GLM to have different intercepts with same slopes for each subject. But probably this is considering the effects of states to be fixed not random. I read about usage of PROC MIXED in this article http://cba.ua.edu/~mhardin/ST610/ST610Web/LongitudinalAnalysisPapers/LONGITUDINAL.pdf and it seems that here we can use fixed as well as extend to random effects too. But I am not sure whether it can consider subjects effects to be fixed or random. If it considers so then can we get different intercepts for different subjects? If PROC MIXED is not the solution then can anyone suggest another procedure that fulfills my requirement ? Thanx Dipanjan

Dipanjan · ‎04-02-2012

Hi, I am building binary logistic regression models of hospitalization(yes/no) in SAS. Now I had some categorical predictors as well as some continuous. As SAS allows to keep them all in analysis so I kept them. But the problem is I don't know if there is any specification about the design for categorical predictors. I read somewhere that GLM coding is useful to keep balance in the design and so I used this. The design sructure is in the image attached. I know my problem is purely statistical but it may ultimately help end users like me. Is there any specification about the design? Thanking- Dipanjan Attached Images

Dipanjan · ‎03-22-2012

Thanks a lot Art297 & Astounding. I have applied method of Art297. While reopening, it was not throwing the data and may be that was because of more complication of the program.e.g. data work.a; set permanent.b; /*subsetting*/ run; data permanent.final; set work.a; /* formatting, restructuring, reformating, count */ run; So can anybody help me to understand why I cannot retrieve my saved data in permanent library, even though I gave the path for the libref next day ? Astounding, What you were suspicious I tried. It works even when model output is needed to retrieve but in my purpose regarding several times formatting, restructuring, SQL joins etc, it is not working. So till now what way I have is to export all to csv at the end of the day and import on the next day. U know it causes loss of information that are capable with SAS data.

Dipanjan · ‎03-21-2012

Hi, I am a new user in SAS. I have shifted from R. I am dealing with a large data (hospitalization). Everyday I open SAS, I loose a lot of time to run all the previous codes to get the formatted and structured data for further use. In R I used to save workspace and thus everyday when I start I could get back the latest works of previous day. Is it possible here with SAS to save workspace given that I have SAS Base and Enterpirse Guide? Dipanjan

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PROC MIXED FOR POOLED REGRESSION?

Design of categorical predictors in proc logistic

Re: Saving workspace like R

Saving workspace like R

Re: PROC MIXED FOR POOLED REGRESSION?

PROC MIXED FOR POOLED REGRESSION?

Design of categorical predictors in proc logistic

Re: Saving workspace like R

Saving workspace like R