topic Re: Syntax for more than 10 random effects in PROC NLMIXED in SAS Procedures

Syntax for more than 10 random effects in PROC NLMIXED

vincetan — Wed, 15 Jan 2014 21:35:37 GMT

Hello,

I have a model that has more than 10 random effects identified by bcoef1-bcoef20. Is there a compact way to write the random statement in PROC NLMIXED other than the usual way of:

"random bcoef1, bcoef2, ..., bcoef20 ~normal([0,0,...,0],[vcoef1,

0, vcoef2,.....

vcoef20]) subject=ID out=outre;"

Thank you!

Re: Syntax for more than 10 random effects in PROC NLMIXED

SteveDenham — Thu, 16 Jan 2014 19:00:19 GMT

Not that I am aware of. Are you truly trying to estimate 190 covariance parameters in a nonlinear model? If so, I want to know what platform (OS, memory, etc.), so that I can talk our company into buying comparable equipment.

Steve Denham

Re: Syntax for more than 10 random effects in PROC NLMIXED

vincetan — Fri, 17 Jan 2014 02:57:46 GMT

Hi Steve,

Thank you. Unfortunately, we have to run a non linear model with more than 10 random effects. We have not tested this out on our computer yet but if it runs successfully, I will inform you.

Best,

Vincent