Ted Pedersen




Statistical library package to calculate the true mutual information for trigrams. This package should be used with statistic.pl and rank.pl.


Note that the true mutual information value is distinct from pointwise mutual information (pmi.pm). True mutual information is equivalent to the log-likelihood ratio (ll3.pm). They only differ by a scaling factor.


Ted Pedersen <tpederse@d.umn.edu>

Satanjeev Banerjee <banerjee@cs.cmu.edu>

Amruta Purandare <pura0010@d.umn.edu>

Bridget Thomson McInnes <bthomson@d.umn.edu>


This measure currently only defined for trigram data stored in 3x3x3 contingency table.


Mailing List: http://groups.yahoo.com/ngram


Copyright 2000-2004 by Ted Pedersen and Satanjeev Banerjee and Amruta Purandare

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.