What’s New in the Base SAS 9.4 Statistical Procedures

The HISTOGRAM statement now supports the OVERLAY option, which overlays histograms that are associated with different levels of a CLASS variable onto a single plot.

Maximum likelihood estimation for Johnson distribution parameters has been improved. You can fit a Johnson distribution by specifying the SU option in the HISTOGRAM statement. You can request maximum likelihood estimation by specifying the FITMETHOD=MLE suboption, and you can control the optimizer that performs the estimation by specifying the new OPTBOUNDRANGE=, OPTMAXITER=, OPTMAXSTARTS=, OPTPRINT, OPTSEED=, and OPTTOLERANCE= suboptions.

The geometric means of analysis variables are now calculated. You can specify the GEOMEAN keyword in an INSET statement to display the geometric mean in a graph, or in an OUTPUT statement to include it in an output data set. The geometric mean is also saved in the _GEOMEAN_ variable in an OUTTABLE= data set.