Various R programming tools for data manipulation, including:
- medical unit conversions,
- combining objects,
- character vector operations,
- factor manipulation,
- obtaining information about R objects,
- manipulating MS-Excel formatted files,
- generating fixed-width format files,
- extricating 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
- wrapper for 'sample' that ensures consistent behavior for both scalar and
vector arguments.
