[ top | up ]
Online Documentation
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.
|
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.
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"