Reimplementations of Functions Introduced Since R-3.0.0

Implementations of functions which have been introduced in R since version 3.0.0. The backports are conditionally exported which results in R resolving the function names to the version shipped with R (if available) and uses the implemented backports as fallback. This way package developers can make use of the new functions without worrying about the minimum required R version.


backports 1.0.4

  • Added hasName() for R versions prior to 3.4.0
  • Added with backport for argument extra_cols.

backports 1.0.3

  • Removed stringi dependency

backports 1.0.2

  • Fixed file.size(), file.mtime() and file.mode() for R-3.1.x.

backports 1.0.1

  • Added file.size(), file.mtime() and file.mode() for R versions prior to 3.2.0

backports 1.0.0

  • Initial version.

Reference manual

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1.1.1 by Michel Lang, 2 months ago

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Browse source code at

Authors: Michel Lang <>

Documentation:   PDF Manual  

GPL-2 license

Imports utils

Imported by OpenML, base64url, batchtools, checkmate, decoder, ggraptR, incadata, mlr, mlrMBO, rprojroot, stringb.

See at CRAN