data(..., list = character(0), package = c(.packages(),.Autoloaded), lib.loc = .lib.loc) show.data(package = c(.packages(),.Autoloaded), lib.loc = .lib.loc)
...
|
a sequence of name s or character strings
|
list
| a character vector |
package
| a name or character vector giving the packages to look into for data sets. 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. |
data
loads or lists via show.data
the available data sets.
The data sets to be loaded can be specified as a sequence of name
s
or character strings, or as the character vector list
, or as both.
If no data sets are specified or show.data
is called directly,
the available data sets are displayed.
Currently, four formats of data files are supported:
".RData"
or ".rda"
are
load()ed
.
".R"
or ".r"
are
source()d
in.
".tab"
or ".txt"
are read using
read.table(..., header = TRUE)
, and hence result in
a data.frame
.
".csv"
are read using
read.table(..., header = TRUE, sep=";")
,
and also result in a data.frame
.
data
calls show.data
.
show.data
looks for a file `00Index' (failing that the
deprecated convention of `index.doc') in a `data'
directory of each specified package, and uses these files to prepare
a listing. If there is a `data' area but no index a warning is
given: such packages are incomplete.help
for obtaining documentation on data sets.data() # list all available data sets data(package = base) # list the data sets in the base package data(crimes, "deaths") # load the data sets `crimes' and `deaths' help(crimes) # give information on data set `crimes'