
R as a Programming Language and
Environment
R is an interpreted expression language. Expressions are composed of objects and operators.
A.1 Help and Information
Some R functions such as library() or data() serve a dual purpose. With minimal argu-
ments, they provide help and information. With specific arguments, they give access to certain
components.
R Help
help() information about an object/a function.
Example: help(help)
help.start() starts browser access to R’s online documentation. The reference sec-
tion includes a search engine to search for keywords, function and
data names and text in help page titles.
args() shows arguments of a function.
example() ...