NAME

Statistics::Associations - Calculates Association Coefficients of Nominal Scale.

SYNOPSIS

  use Statistics::Associations;
  my $asso = Statistics::Associations->new;

  # Basic Methods
  # calculates coefficients

  my $matrix = [ [ 6, 4 ], [ 5, 5 ] ];
  my $phi         = $asso->phi($matrix);
  my $contingency = $asso->contingency($matrix);
  my $cramer      = $asso->cramer($matrix);

  # -------------------

  # Helper Methods
  # it helps you to making matrix

  while(<STDIN>){
      my $row_label = ...;
      my $col_label = ...;
      my $value = ...;
      $asso->make_matrix( $row_label, $col_label, $value );
  }
  my $matrix = $asso->matrix;

  # convert to hash_ref
  my $hash_ref = $asso->convert_hashref;

DESCRIPTION

Statistics::Associations is a calculator of Association Coefficients that specialized in 'Nominal Scale'.

It calculates next three coeffients.

 * phi
 * contingency
 * cramer

And it calculates chi-square, too.

And then, it helps you to making matrix in a loop that looks like parsing logs.

METHODS

new

phi( $matrix )

contingency( $matrix )

cramer( $matrix )

chisq( $matrix )

make_matrix( $row_label, $col_label, [$value] )

matrix()

convert_hashref()

AUTHOR

takeshi miki <miki@cpan.org>

LICENSE

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

SEE ALSO