AI-NNFlex

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CHANGES  view on Meta::CPAN

0.24
20050620

Fixed a bug in the implementation of bias weights. Implemented
the addition example.

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0.23
20050424

changed sigmoid to sigmoid2 in mathlib - this is a sigmoid
function generally used in BPTT, which isn't yet implemented.

Replaced with a more standard 1/1+exp(1)**-x function.

Implemented Hopfield module.

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0.22

lib/AI/NNFlex.pm  view on Meta::CPAN

#
# 0.20 20050307		CColbourn	Modified for inheritance to simplify
#					future network types
#
# 0.21 20050316		CColbourn	Rewrote perldocs, implemented fahlman
#					constant, chopped out old legacy stuff
#					put math functions in mathlib, etc etc
#
# 0.22 20050317		CColbourn	Implemented ::connect method
#
# 0.23 20050424		CColbourn	Included Hopfield module in dist.
#
# 0.24 20050620		CColbourn	Corrected a bug in the bias weight
#					calculation
#
#
###############################################################################
# ToDo
# ====
#
# Modify init to allow recurrent layer/node connections
# write cmd & gui frontends
# Speed the bugger up!
#
# Odd thought - careful coding of a network would allow grafting of
# two different network types or learning algorithms, like an effectve
# single network with 2 layers unsupervised and 2 layers supervised
#
# Clean up the perldocs
#
###############################################################################
$VERSION = "0.24";


###############################################################################
my @DEBUG; 	# a single, solitary, shameful global variable. Couldn't
		#avoid it really. It allows correct control of debug
		#information before the $network object is created
		# (in ::layer->new & ::node->new for  example).


###############################################################################

lib/AI/NNFlex.pm  view on Meta::CPAN

v0.17 is a bugfix release, plus some cleaning of UI

v0.20 changes AI::NNFlex to be a base class, and ships three different network types (i.e. training algorithms). Backprop & momentum are both networks of the feedforward class, and inherit their 'run' method from feedforward.pm. 0.20 also fixes a who...

v0.21 cleans up the perldocs more, and makes nnflex more distinctly a base module. There are quite a number of changes in Backprop in the v0.21 distribution.

v0.22 introduces the ::connect method, to allow creation of recurrent connections, and manual control over connections between nodes/layers.

v0.23 includes a Hopfield module in the distribution.

v0.24 fixes a bug in the bias weight calculations

=head1 COPYRIGHT

Copyright (c) 2004-2005 Charles Colbourn. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

=head1 CONTACT

 charlesc@nnflex.g0n.net

=cut

lib/AI/NNFlex/Dataset.pm  view on Meta::CPAN

##########################################################
# Dataset methods for AI::NNFlex - perform learning etc
# on groups of data
#
##########################################################
# Versions
# ========
#
# 1.0	20050115	CColbourn	New module
#
# 1.1	20050324	CColbourn	Added load support
#
##########################################################
# ToDo
# ----
#
#
###########################################################
#
use strict;
package AI::NNFlex::Dataset;