08-05-2013 02:16 PM
I am doing a simulation with repeated model. How can I estimate REML for regression parameters using SAS IML? Do I have to write a program? Any help I appreciate.
Thank you in advanced.
08-06-2013 09:54 AM
Yes, you would have to write a program to do this in IML. However, there are several procedures (MIXED, GLIMMIX, HPMIXED) that are available to get REML estimates, both fixed and random effects.
08-06-2013 12:07 PM
Thank you so much Steve...If anybody can give me a link or any help It will great appreciate..I am new to SA, no idea how to start this..
08-07-2013 01:56 PM
I would look through the documentation for PROC MIXED, and examine the many examples. Here is a link:
05-14-2014 04:18 PM
As Steve noted you can use both the mixed and the glimmix procedure. MIXED has somewhat great flexibility in the types of V covariance matrices you can fit while GLIMMIX allows for non-normal distributions and has some additional options for the MCPs. They also vary in the sort of iterative process they use to estimate the covariance parameters in the V matrix.