NAME

tmi.pm

SYNOPSIS

Statistical library module to calculate the true mutual information value. This module should be used with statistic.pl and rank.pl.

DESCRIPTION

We call this true mutual information to distinguish it from pointwise mutual information (pmi).

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 (ll.pm). They only differ by a scaling factor.

AUTHORS

Ted Pedersen <tpederse@d.umn.edu>

Satanjeev Banerjee <banerjee@cs.cmu.edu>

Amruta Purandare <pura0010@d.umn.edu>

Bridget McInnes <bthomson@d.umn.edu>

BUGS

This measure currently only defined for bigram data stored in 2x2 contingency table.

SEE ALSO

Home Page : http://www.d.umn.edu/~tpederse/nsp.html

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

COPYRIGHT

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

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.