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The "Handy-Dandy, Quick-n-Dirty" Automated Contrast Generator - ASAS/IMLR Macro to Support the GLM, MIXED, and GENMOD Procedures
Division of Biostatistics, School of Medicine, Washington University in St. Louis
Contrasts are an important component of the armamentarium of the statistician. In the SAS/STAT ®
GENMOD procedures, the contrasts are used to answer specific additional questions. In many cases, it is difficult to define contrasts which are estimable, or correctly formed. A macro which converts a question about differences between cells (defined in several ways) into estimable contrasts
is described. This macro uses SAS/IML ® to convert the comparison into the various components of the comparison into SAS ® system contrasts. Using several macro components unique to the SAS/IML system, the macro generates contrasts which are invariably estimable.