README for SGT package

    Last updated for version 2.10, 12 January 2007

    This document provides a general introduction to the SGT
    package.

    This Perl module implements the Simple Good Turing (SGT) algorithm 
    for smoothing of probabilistic values developed by William Gale and 
    Geoffrey Sampson. 

    The algorithm is described in detail in Sampson's Empirical Linguistics
    (Continuum International, London and New York, 2001), chapter 7.
    An online version of this paper is available at Geoffrey Sampson's
    homepage under http://www.grsampson.net/AGtf.html .

    Basic usage:

	use Statistics::Smoothing::SGT;
	my $sgt = new Statistics::Smoothing::SGT($frequencyClasses, $total);
	$sgt->calculateValues();
  	$probabilities = $sgt->getProbabilities();
  	$newFrequencies = $sgt->getNewFrequencies();
  	$nBar = $sgt->getNBar();

	Florian Doemges, florian@doemges.net

	Bjoern Wilmsmann, bjoern@wilmsmann.de

	Homepage: http://www.topicalizer.com/bwilmsmann/wiki/index.php/SGT

    Copyright (C) 2006, Florian Doemges and Bjoern Wilmsmann,
    Department of Linguistics, Ruhr-University, Bochum.

    Partially based on the SGT module (Copyright (C) 2004) by Andre Halama
    (halama@linguistics.rub.de) and Tibor Kiss (tibor@linguistics.rub.de),
    Department of Linguistics, Ruhr-University, Bochum.

    This module in turn was based on the works (including an implementation
    of the algorithm in C) by
    Geoffrey Sampson, Department of Informatics, University of Sussex.

    This program is free software; you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by the
    Free Software Foundation; either version 2 of the License, or (at your
    option) any later version.

    This program is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
    Public License for more details.

    You should have received a copy of the GNU General Public License along
    with this program; if not, write to

        The Free Software Foundation, Inc.,
        59 Temple Place - Suite 330,
        Boston, MA  02111-1307, USA.

    Note: a copy of the GNU General Public License is available on the web
    at <http://www.gnu.org/licenses/gpl.txt> and is included in this
    distribution under the name GPL.

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