ksformat - 'SAS'-Style 'PROC FORMAT' for R
Provides 'SAS' 'PROC FORMAT'-like functionality for
creating and applying value formats in R. Supports discrete and
range-based mapping of values to labels, reverse formatting
(invalue), date/time/datetime formatting with built-in 'SAS'
format names, multi-label formats, expression labels evaluated
at apply-time, case-insensitive matching, import/export of
format definitions, and proper handling of missing values (NA,
NULL, NaN).
