Rscript {utils} | R Documentation |
This is an alternative front end for use in #!
scripts and
other scripting applications.
Rscript [options] [-e expression] file [args]
options |
A list of options beginning with |
expression |
a R expression. |
file |
The name of a file containing R commands. |
args |
Arguments to be passed to the script in |
Rscript --help
gives details of usage, and Rscript
--version
gives the version of Rscript
.
Other invocations invoke the R front-end with selected options. This
front-end is convenient for writing #!
scripts since it is an
executable and takes file
directly as an argument. Options
--slave --no-restore
are always supplied: these imply
--no-save
.
Either one or more -e options or file
should
be supplied. When using -e options be aware of the quoting
rules in the shell used: see the examples.
Additional options accepted (before file
or args
) are
--verbose
gives details of what Rscript
is
doing. Also passed on to R.
--default-packages=list
where list
is a
comma-separated list of package names or NULL
. Sets the
environment variable R_DEFAULT_PACKAGES which determines the
packages loaded on startup. The default for Rscript
omits
methods as it takes about 60% of the startup time.
Normally the version of R is determined at installation, but this can be overridden by setting the environment variable RHOME.
stdin()
refers to the input file, and
file("stdin")
to the stdin
file stream of the
process.
Rscript
is only supported on systems with the execv
system call.
## Not run:
Rscript -e 'date()' -e 'format(Sys.time(), "%a %b %d %X %Y")'
## example #! script for a Unix-alike
#! /path/to/Rscript --vanilla --default-packages=utils
args <- commandArgs(TRUE)
res <- try(install.packages(args))
if(inherits(res, "try-error")) q(status=1) else q()
## End(Not run)