Programming the statistical procedures from SAS

PROC GLIMMIX

Reply
Occasional Contributor AJ8
Occasional Contributor
Posts: 5

PROC GLIMMIX

[ Edited ]

Running PROC GLIMMIX on two different occasions with the same data yield two different estimates for "Fixed Intercept", while eveyrthing else (Covariance estimates/OR/ CL etc.) stayed the same.

 

This is the second time it happened, the first time was a year ago with a different set of data.

 

I would really APPRECIATE if someone tells me what is going on.

SAS Super FREQ
Posts: 3,547

Re: PROC GLIMMIX

I assume that you upgraded to a newer version of SAS/STAT between runs?

Occasional Contributor AJ8
Occasional Contributor
Posts: 5

Re: PROC GLIMMIX

Hi there!

 

Thank you so much for your reply! I don't think that I upgraded, but I am running SAS server. Does that automaticlaly upgrade my SAS? Even so why would the estimate varies?

 

 

SAS Super FREQ
Posts: 3,547

Re: PROC GLIMMIX

[ Edited ]

You can find your SAS version by running

 

%put &=SYSVLONG;

 

on both systems.

 

You can get different answers for ill-fitting problems when you change releases or operating systems (Windows <--> Linux). The problem usually indicates that the likelihood function is very flat and/or that the model does not fit the data. For a discussion, see this thread:

Occasional Contributor AJ8
Occasional Contributor
Posts: 5

Re: PROC GLIMMIX

THANK YOU SO MUCH! I can't open the thread though, it is invalid.Do you mind providing me the link again? THANK YOU!

SAS Super FREQ
Posts: 3,547

Re: PROC GLIMMIX

I think I had a 'cut-and-paste' error.  I have edited and corrected the link in my previous response.

Occasional Contributor AJ8
Occasional Contributor
Posts: 5

Re: PROC GLIMMIX

THANK YOU!

Ask a Question
Discussion stats
  • 6 replies
  • 166 views
  • 1 like
  • 2 in conversation