
                 Release History of "entropy" Package
               ========================================

             CHANGES IN `entropy' PACKAGE VERSION 1.3.1

- updated Authors@R field.
- updated URLs.
- fixed errors flagged by R-devel in documentation.


             CHANGES IN `entropy' PACKAGE VERSION 1.3.1

- updated URLs in documentation.


             CHANGES IN `entropy' PACKAGE VERSION 1.3.0

- updated documentation for chi2.plugin() and and chi2.empirical() to compute
  chi-squared divergence.
- new functions  Gstat() and chi2stat() to compute the statistic and the Pearson
  chi-squared statistic with (asymptotic) p-values.
- new functions Gstatindep() and chi2statindep() to compute the G statistic and
  Pearson chi-squared statistic to test independence.


             CHANGES IN `entropy' PACKAGE VERSION 1.2.1

- change of maintainer email address.


             CHANGES IN `entropy' PACKAGE VERSION 1.2.0

* new functions KL.plugin(), KL.empirical(), Kl.Dirichlet(), and 
  KL.shrink() for computing the Kullback-Leibler divergence.
* new functions chi2.plugin(), chi2.empirical(), chi2.Dirichlet(), and
  chi2.shrink() for computing the chi-squared statistic.
* new functions chi2indep.plugin(), chi2indep.empirical(), 
  chi2indep.Dirichlet(), and chi2indep.shrink() for computing the 
  chi-squared statistic of independence.
* new discretize2d() function for simple binning of a pair of random
  variables.
* in all shrinkage functions the target option has been removed (and
  the default uniform target is now always used).
 

             CHANGES IN `entropy' PACKAGE VERSION 1.1.9

* new discretize() function for simple binning of a continuous random
  variable.
* now requires R >= 2.15.1.


             CHANGES IN `entropy' PACKAGE VERSION 1.1.8

* License file removed.
* Dependencies updated.
* the functions freqs.shrink(), entropy.shrink(), mi.shrink(), 
  entropy(), and freqs() now allow to specify the shrinkage intensity.


             CHANGES IN `entropy' PACKAGE VERSION 1.1.7

* NAMESPACE file added


             CHANGES IN `entropy' PACKAGE VERSION 1.1.6

* small in documentation file fixed (for R 2.13.0 release)
* added in documentation that the default unit for the entropy
  is "nats" (natural units), for "bits" one needs to set unit="log2".


             CHANGES IN `entropy' PACKAGE VERSION 1.1.5

* small bug in documentation file fixed (for R 2.11.0 release)


             CHANGES IN `entropy' PACKAGE VERSION 1.1.4

* reference to publication (Hausser and Strimmer, 2009) added


             CHANGES IN `entropy' PACKAGE VERSION 1.1.3

* small changes to update documentation


             CHANGES IN `entropy' PACKAGE VERSION 1.1.2

* verbose messages for shrinkage entropy are now more informative and 
  in the same style as those from corpcor
* man pages slightly updated


              CHANGES IN `entropy' PACKAGE VERSION 1.1.1

* bug fix: freqs.shrink() now also works for sample sizes 1 and 0
* freqs.shrink(), entropy.shrink() and mi.shrink() now return the
  estimated shrinkage intensity as attribute (lambda.freqs).


              CHANGES IN `entropy' PACKAGE VERSION 1.1.0

* several new functions added for estimating mutual information:
  mi.plugin(), mi.empirical(), mi.Dirichlet() and mi.shrink().


              CHANGES IN `entropy' PACKAGE VERSION 1.0.0


This package implements the following entropy estimators:

* the James-Stein shrinkage estimator by Hausser and Strimmer,
* the maximum likelihood estimator,
* the Miller-Madow estimator,
* various Bayesian estimators (based on Dirichlet-multinomial model),
* and the Chen-Shao estimator.

It also provides an R interface to the
*  Nemenman-Shafee-Bialek (NSB) estimator.

* This is the first public release (2 September 2008).

