data {base} | R Documentation |
data
loads a data set or lists (via show.data
)
the available data sets.
data(..., list = character(0), package = .packages(), lib.loc = .lib.loc) show.data(package = .packages(), 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. |
Currently, four formats of data files are supported:
load()
ed.
source()
d in, with the R working directory changed
temporarily to the directory containing the respective file.
read.table(..., header = TRUE)
, and hence result in
a data frame.
read.table(..., header = TRUE, sep = ";")
,
and also result in a data frame.
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.
If no data sets are specified, data
calls show.data
.
show.data
looks for a file `00Index' 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.
If lib.loc
is not specified, the packages are searched for
amongst those already loaded, followed by the data
directory
(if any) of the currrent working directory.
If lib.loc
is specified,
they are searched for in the specified libraries, even if they are
already loaded from another library.
To just look in the data
directory of the current working
directory, set package = NULL
.
data()
returns a character vector of all data sets specified,
an empty character vector if none were specified.
The data files can be many small files. On some file systems it is desirable to save space, and the files in the `data' directory of an installed package can be zipped up as a zip archive `Rdata.zip'. You will need to provide a single-column file `filelist' of file names in that directory.
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(USArrests, "VADeaths") # load the data sets `USArrests and `VADeaths' help(USArrests) # give information on data set `USArrests'