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PROC MIXED: Save random coefficients to a dataset

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Occasional Contributor
Posts: 9

PROC MIXED: Save random coefficients to a dataset

 

It seems that with the option / SOLUTION in the RANDOM statement of PROC MIXED, I can create a table of estimated random coefficients, which I need. I have two questions:

 

1. How do I, if I can, save them as a dataset? 

 

2. What do the results represent? Are they the estimated coefficients themselves or are they deviations from the mean (the fixed coefficient)? If they are deviations, how do I get the actual coefficient? Is it, for example, FIXED COEFFICIENT - DEVIATION, FIXED COEFFICIENT + DEVIATION, ...?

 

Thanks!

 

 

Respected Advisor
Posts: 2,655

Re: PROC MIXED: Save random coefficients to a dataset

A little quick digging through the reference for the RANDOM statement:

 

1. ods output solutionr=solutionr; will put the values into a dataset

2. The results are EBLUPS for the random effects. A good way to think of them is as residuals of the fixed effects (y minus X * beta hat) times (G hat *Z prime *V hat-inverse), so they are scaled by a quadratic form.

 

For a quick review, look at Mixed Models Theory in the Details section of the MIXED documentation.

 

Steve Denham

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