Graph::Statistics - Perl extension for calculating network constraint and other network statistics.
use Graph::Statistics ':all';
# create hash representing graph
my %g;
foreach $f ( qw( a b c ) ) {
foreach $t ( qw( a b c ) ) {
next if $f eq $t;
$g{$f}{$t} = rand();
}
}
# every time the network changes and before calculations
# not needed if you are only creating the graph once
flushCache();
# print out Burt network constraint value for each node
foreach $f ( keys %g ) {
print "$f,", constraint(\%g,$f), "\n";
}
# print out Coleman-Theil disorder index for each node
foreach $f ( keys %g ) {
print "$f,", CTdi(\%g,$f), "\n";
}
Calculates Burt's network constraint value on nodes within a hash based network representation. An earlier version (not public) was based on Graph, but that was too slow for networks of size.
returns the network constraint
the portion of the network constraint on a by b.
the portion of the value ab of the total weights of edges from a.
clears an internal cache used to speed everything up.
Coleman-Theil disorder index. A measure of diversity of neighbor nodes.
Erich S. Morisse, <emorisse@cpan.org>
Copyright (C) 2009 by Erich Morisse
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.8 or, at your option, any later version of Perl 5 you may have available.
