# NAME

# NAME

Lingua::JA::DocumentFrequency::AozoraBunko - Return the document frequency in Aozora Bunko

# SYNOPSIS

use Lingua::JA::DocumentFrequency::AozoraBunko;
use utf8;

aozora_df('本'); # => 5180
aozora_df('遊蕩'); # => 160
aozora_df('チャカポコ'); # => 3
aozora_df('しおらしい'); # => 149
aozora_df('イチロー'); # => 0

Lingua::JA::DocumentFrequency::AozoraBunko::df('ジャピイ'); # => 2
Lingua::JA::DocumentFrequency::AozoraBunko::df('カア'); # => 23

my $N = Lingua::JA::DocumentFrequency::AozoraBunko::number_of_documents(); # => 11176
idf('ジャピイ'); # => 8.62837672037685
idf('カア'); # => 6.18602968500765

sub idf { log( $N / aozora_df(shift) ) }

# DESCRIPTION

Lingua::JA::DocumentFrequency::AozoraBunko returns the document frequency in Aozora Bunko.

# METHODS

## df($word)

Returns the document frequency of $word.

## aozora\_df($word)

Same as df method, but this method is exported by default.

## number\_of\_documents

Returns the number of the documents in Aozora Bunko.

# LICENSE

Copyright (C) pawa.

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

# AUTHOR

pawa <[email protected]>