NAME
README for SGT package
Last updated for version 2.10, 12 January 2007
SYNOPSIS
This document provides a general introduction to the SGT
(Simple Good Turing smoothing) package.
DESCRIPTION
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();
AUTHORS
Florian Doemges,
[email protected]
Bjoern Wilmsmann,
[email protected]
BUGS
SEE ALSO
Homepage:
http://www.topicalizer.com/bwilmsmann/wiki/index.php/SGT
COPYRIGHT
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
(
[email protected]) and Tibor Kiss (
[email protected]),
Department of Linguistics, Ruhr-University, Bochum.
This module in turn was based on the work (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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