An Introduction to PROC NLMIXED


A.1 Fitting a Simple Linear Model: PROC GLM vs PROC NLMIXED

A.2 PROC NLMIXED and the Binormal Model

PROC NLMIXED plays a central role in this book. Chapters 3, 4, and 5 use it to fit the binormal model, which is one of the fundamental tools to construct and analyze ROC curves.

PROC NLMIXED offers unique and wide-ranging capabilities, but its syntax is different from most other SAS/STAT modeling procedures. For this reason, the PROC NLMIXED code may be difficult to discern and harder to grasp for readers who are used to gaining insight by studying the programs used for model fitting. This appendix is written ...

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