Recent Enhancements and New Directions in SAS/STAT Software, Part I: Updates

Version 7 of the SAS System brings major enhancements to the statistical software. All output is now handled by the Output Delivery System, which gives the user control over the printing of the results, allows all tables and statistics to be output to SAS data sets, and produces web-browsable HTML output. New procedures provide tools for partial least squares analysis and spatial prediction. The GENMOD procedure now provides LSMEANS and ESTIMATE state-ments, and its GEE facility provides the alternating logistic regression algorithm, produces Wald and score tests for model effects, and handles the ordinal response case. Ad-ditional exact tests have been added to several procedures, and even the TTEST procedure has been updated. In addition to procedures for survey design and analysis, Version 7 also introduces experimental procedures for non-parametric density estimation and nonparametric regres-sion, as discussed in Part II of this paper