WEIGHT Statement :: SAS/Genetics(TM) 12.3 User's Guide

WEIGHT Statement

WEIGHT variable ;

If you do not specify a REPEATED statement, the WEIGHT statement operates exactly like the one in PROC GLM. In this case PROC BTL replaces $\mb {X’X}$ and $\mb {Z’Z}$ with $\mb {X’WX}$ and $\mb {Z’WZ}$ , where $\mb {W}$ is the diagonal weight matrix. If you specify a REPEATED statement, then the WEIGHT statement replaces $\bR$ with $\mb {LRL}$ , where $\mb {L}$ is a diagonal matrix with elements $\mb {W} ^{-1/2}$ . Observations with nonpositive or missing weights are not included in the PROC BTL analysis.

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The BTL Procedure (Experimental)

WEIGHT Statement