S+RESAMPLE : Copyright (c) 2000-2008 TIBCO Software Inc. All rights reserved.
Version 4.0, for Spotfire S+ 8.1 (Unix, Linux, Windows) and later.


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S+Resample : A Spotfire S+ package for resampling
	
S+Resample is an object-oriented toolkit for the use of statistical
resampling techniques, including
    * bootstrap
    * jackknife
    * influence
    * cross-validation
    * bootstrap estimation of prediction errors
    * permutation tests
    * bootstrap tilting -- NEW!

A feature of this code is bootstrap tilting, which generally provides
very accurate (second-order accurate) confidence intervals, with
better finite-sample performance than other bootstrap methods, and require
only 1/17 or 1/37 as many bootstrap replications as other bootstrap
methods (for 95% confidence intervals), e.g. 60 replications instead
of 1000 or 2000.

Please browse to 
	http://spotfire.tibco.com/support
and register for a support account.

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---- Overview

The code falls into five general categories:

(1) General-purpose Spotfire S+ software, 
    upgrades of existing Spotfire S+ functions to support resampling.

(2) New versions of `bootstrap' and related code.

(3) New resampling functions, 
    for permutation tests, cross validation, bootstrapping prediction
    errors, parametric and smoothed bootstrapping.

(4) New functions for bootstrap tilting inferences and diagnostics.

(5) New GUI features for Windows users.

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---- Documentation

(o) Help files

  Most functions have help files; see in particular:
  * help(resampleOverview) -- an annotated list of functions
  * help(resamp.problems)  -- some known issues and workarounds.

(o) Release notes

  * doc/ReleaseNotes.txt describes new and modified functions
  * doc/ChangeLog.txt notes important changes between different
    versions of the package.

(o) Manual

  * resample.pdf

(o) Tutorial and Technical Reports

  * doc/tutorial.ssc
  * other files in the doc folder

(o) For more information, including relevant technical reports, see
        http://www.insightful.com/Hesterberg/bootstrap/ 

(o) Data packages for use with some statistics texts are found at
        http://www.insightful.com/Hesterberg/bootstrap/
    These packages contain more examples on how to use the graphical
    interface.

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---- Acknowledgements

This work was supported by
NIH SBIR 2R44CA67734--02 "Statistical Software for Resampling Methods"
NSF SBIR DMI-0078706 "Bootstrap Tilting Inference and Large Data Sets"
Contributors include:
	Andrea Borning
	Ashley Clipson
	Steve Ellis
	Rachel Epstein
	Chris Fraley
	Tim Hesterberg
	Shan Jin
	Shaun Monaghan
	Charles Roosen
	Jim Schimert
	Robert Thurman
We also appreciate advice received from Brad Efron, Frank Harrell,
David S. Moore, Art Owen, Luigi Salmaso, Terry Therneau, and Rob Tibshirani.
