New version of ipred package

Andrea Peters Andrea.Peters at
Mon Sep 30 16:38:56 CEST 2002

Version 0.6-0 of the ipred package has just been released on CRAN.


Package: ipred
Title: Improved Predictors
Version: 0.6-0
Date: $Date: 2002/09/27 08:07:29 $
Author: Andrea Peters <Andrea.Peters at> and
  Torsten Hothorn <Torsten.Hothorn at>
Maintainer: Andrea Peters <Andrea.Peters at>
Description: Improved predictive models by indirect classification and
  bagging for classification, regression and survival problems
  as well as resampling based estimators of prediction error.
Depends: rpart (>= 3.1-8), MASS, mlbench, survival, nnet, class
License: GPL

Major changes since 0.4-6:

        o  parts of the code have been completely rewritten.

        o  added bagging for censored data.

        o  the Brier score for censored data (Graf et al., 1999) is
           available in function `sbrier' and can be used
           to measure the prediction error in survival problems.

        o  bagging is roughly 50% faster now.

        o  stabilised linear disciminant analysis (`slda') implemented.

        o  some datasets were added, especially those used as
           examples in R News (2002, 2(2), 33-36).

        o  cross-validated predictions can be computed: useful for
           estimating sensitivity and specifity, for example.

        o  the package now has a small vignette with some examples.

The authors would like to thank Guenther Sawitzki and Antony Unwin for
helpful comments and suggestions.



        Dipl.-Stat. Andrea Peters
        Institut fr Medizininformatik, Biometrie und Epidemiologie
        Waldstrasse 6, D-91054 Erlangen, Deutschland
        Tel: ++49-9131-85-22722
        Fax: ++49-9131-85-25740

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