NAME

Statistics::SocialNetworks - Perl extension for calculating network constraint and other network statistics.

SYNOPSIS

 use Statistics::SocialNetworks ':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";
 }

DESCRIPTION

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.

Methods

• constraint(hashreference, nodeidentifier)

  returns the network constraint

• c(hash reference, node identifier a, node identifier b)

  the portion of the network constraint on a by b.

• p(hash reference, node identifier a, node identifier b)

  the portion of the value ab of the total weights of edges from a.

• flushCache()

  clears an internal cache used to speed everything up.

• CTdi(hash reference, node identifier)

  Coleman-Theil disorder index. A measure of diversity of neighbor nodes.

AUTHOR

Erich S. Morisse, <emorisse@cpan.org>

COPYRIGHT AND LICENSE

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.