The following are highlights of other enhancements in SAS/STAT 12.1:
The MCMC procedure now models missing values by default. The RANDOM statement supports multilevel hierarchy to an arbitrary depth. The procedure also implements faster and more efficient sampling algorithms.
The PHREG procedure supports Bayesian frailty models.
The FMM procedure for finite mixture models is now production and adds several truncated distributions.
The LIFEREG and PROBIT procedures include additional postprocessing statements. They now support the TEST, LSMEANS, LSMESTIMATE, ESTIMATE, SLICE, and EFFECTPLOT statements.
The FREQ procedure produces mosaic plots.
The SURVEYSELECT procedure provides Poisson sampling.
The SURVEYMEANS procedure now performs poststratification estimation.
The GLM, MIXED, GLIMMIX, and ORTHOREG procedures support the REF= option in the CLASS statement.
More information about the changes and enhancements follows. Details can be found in the documentation for the individual procedures in the SAS/STAT 12.1 User’s Guide.