sessionInfo Collect Information About the Current R Session

Description

Print version information about R, the OS and attached or loaded packages.

Usage

sessionInfo(package = NULL)
## S3 method for class 'sessionInfo'
print(x, locale = TRUE,
      RNG = !identical(x$RNGkind, .RNGdefaults), ...)
## S3 method for class 'sessionInfo'
toLatex(object, locale = TRUE,
        RNG = !identical(object$RNGkind, .RNGdefaults), ...)
osVersion

Arguments

package	a character vector naming installed packages, or NULL (the default) meaning all attached packages.
x	an object of class "sessionInfo".
object	an object of class "sessionInfo".
locale	show locale and code page information?
RNG	show information on RNGkind()? Defaults to true iff it differs from the R version's default, i.e., RNGversion(*).
...	currently not used.

Value

sessionInfo() returns an object of class "sessionInfo" which has print and toLatex methods. This is a list with components

R.version	a list, the result of calling R.Version().
platform	a character string describing the platform R was built under. Where sub-architectures are in use this is of the form platform/sub-arch (nn-bit).
running	a character string (or possibly NULL), the same as osVersion, see below.
RNGkind	a character vector, the result of calling RNGkind().
matprod	a character string, the result of calling getOption("matprod").
BLAS	a character string, the result of calling extSoftVersion()["BLAS"].
LAPACK	a character string, the result of calling La_library().
locale	a character string, the result of calling Sys.getlocale().

basePkgs	a character vector of base packages which are attached.
otherPkgs	(not always present): a character vector of other attached packages.
loadedOnly	(not always present): a named list of the results of calling packageDescription on packages whose namespaces are loaded but are not attached.

osVersion

osVersion is a character string (or possibly NULL on bizarre platforms) describing the OS and version which it is running under (as distinct from built under). This attempts to name a Linux distribution and give the OS name on an Apple Mac.

It is the same as sessionInfo()$running and created when loading the utils package.

Windows may report unexpected versions: see the help for win.version.

How OSes identify themselves and their versions can be arcane: where possible osVersion (and hence sessionInfo()$running) uses a human-readable form.

Where R is compiled under an earlier version of macOS (as the CRAN distribution has been) but running under ‘Big Sur’, macOS reports itself as 10.16 (which R recognizes as ‘Big Sur’) and not 11.x.

Note

The information on ‘loaded’ packages and namespaces is the current version installed at the location the package was loaded from: it can be wrong if another process has been changing packages during the session.

See Also

R.version

Examples

sI <- sessionInfo()
sI
# The same, showing the RNGkind, but not the locale :
  print(sI, RNG = TRUE, locale = FALSE)
toLatex(sI, locale = FALSE) # shortest; possibly desirable at end of report