Functions for the Book "An Introduction to the Bootstrap"

Software (bootstrap, cross-validation, jackknife) and data for the book "An Introduction to the Bootstrap" by B. Efron and R. Tibshirani, 1993, Chapman and Hall. This package is primarily provided for projects already based on it, and for support of the book. New projects should preferentially use the recommended package "boot".



  • Fix the GPA variable in the "law" dataset. The values are now of the form 3.39, instead of 339. This is consistent with the book and with the "law82" dataset (thanks to Hon Hwang).
  • Update maintainer email address.


  • Use stats::quantile with type = 1, instead of a manually coded quantile operation that resulted in a bug that lead to a zero index being used if small nboot, and alpha close to boundary (thanks to David Flater of NIST).
  • Give warning if nboot not larger than 1/min(alpha, 1 - alpha) (thanks to David Flater of NIST).
  • Give error if alpha values are not in (0,1).
  • Add some regression tests.
  • Fix typo in bcanon.Rd (thanks to Paul Donner).
  • Fix some typos in scor.Rd (thanks to Jeffrey Racine).


  • Remove executable bit from all files that had it set.

Changes in 2012:

  • Introduced file NAMESPACE.
  • Introduced date-based version numbers.
  • Fixed an error in the examples section of abcnon.Rd.

Changes 2005 - 2009:

  • Returns of the form return( , , , ...) changed to return(list( , , , ...)).
  • Code - documentation inconsistencies removed.
  • Added help pages for all the datasets, and removed the dummy one.
  • Added examples, some new datasets added.

Changes from original:

  • Changed all dyn.load2 calls to use dyn.load.
  • Fixed call of boott (had 2 variable argument lists).
  • Restructered help files for R consistency.
  • Added dummy help page for data and internal functions.

Reference manual

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2019.6 by Scott Kostyshak, 2 years ago

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Browse source code at

Authors: S original , from StatLib , by Rob Tibshirani. R port by Friedrich Leisch.

Documentation:   PDF Manual  

Task views: Econometrics, Statistics for the Social Sciences

BSD_3_clause + file LICENSE license

Depends on stats

Imported by GENLIB, GRTo, IntegratedMRF, MultivariateRandomForest, QFASA, fishmethods, htestClust, multifear.

Depended on by Dowd, ECGofTestDx.

Suggested by BiodiversityR, asht, prabclus.

See at CRAN