gdata: Various R Programming Tools for Data Manipulation
Gregory R. Warnes, Gregor Gorjanc, Árni Magnússon, Liviu Andronic, J E Rogers, D MacQueen, Ales Korosec · 2005
Various R programming tools for data manipulation, including medical unit conversions, combining objects, character vector operations, factor manipulation, obtaining information about R objects, generating fixed-width format files, extracting components of date & time objects, operations on columns of data frames, matrix operations, operations on vectors, operations on data frames, value of last evaluated expression, and a resample() wrapper for sample() that ensures consistent behavior for both scalar and vector arguments.