| 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"