help {base}

R Documentation

Online Documentation

Description

These functions provide online access to documentation. Documentation on a topic with name name (typically, an R object or a data set) can be printed on-screen with either help(name) or ?name. In the case of unary and binary operators and control-flow special forms, the name may need to be be quoted.

Usage

help(topic, package = .packages(), lib.loc = .lib.loc)

?topic

Arguments

topic	a name or character string on which documentation is sought.
package	a name or character vector giving the packages to look into for documentation. By default, all packages in the search path are used.
lib.loc	A character vector of directory names of R libraries. Defaults to all libraries currently known.

See Also

help.start() which opens the HTML version of the R Manual; library for listing available packages and the user-level objects they contain; data for listing available data sets; methods.

Examples

help()
help(help)                   # the same

help(lapply)
?lapply                      # the same

help("for")                  # or ?"for", but the quotes are needed
?"+"

data()                       # list all available data sets
?women                       # information about data set "women"

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