load {base}

R Documentation

Reload Saved Datasets

Description

Reload datasets written with the function save.

Usage

load(file, envir = parent.frame())

Arguments

file	a (readable binary) connection or a character string giving the name of the file to load.
envir	the environment where the data should be loaded.

Details

load can load R objects saved in the current or any earlier format. It can read a compressed file (see save) directly from a file or from a suitable connection (including a call to url).

Only R objects saved in the current format (used since R 1.4.0) can be read from a connection. If no input is available on a connection a warning will be given, but any input not in the current format will result in a error.

Loading from an earlier version will give a warning about the ‘magic number’: magic numbers 1971:1977 are from R < 0.99.0, and R[ADX]1 from R 0.99.0 to R 1.3.1.

Value

A character vector of the names of objects created, invisibly.

Warning

Saved R objects are binary files, even those saved with ascii = TRUE, so ensure that they are transferred without conversion of end of line markers. load tries to detect this case and give an informative error message.

See Also

save, download.file.

Examples

## save all data
xx <- pi # to ensure there is some data
save(list = ls(all=TRUE), file= "all.Rdata")
rm(xx)

## restore the saved values to the current environment
local({
   load("all.Rdata")
   ls()
})
## restore the saved values to the user's workspace
load("all.Rdata", .GlobalEnv)

unlink("all.Rdata")

## Not run: 
con <- url("http://some.where.net/R/data/example.rda")
## print the value to see what objects were created.
print(load(con))
close(con) # url() always opens the connection

## End(Not run)

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