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Ruby code to access Microsoft's Ngram data

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README.md

microsoft_ngram

This is a simple ruby gem to access the Bing Ngram data. It's loosely based on Microsoft's Python library. Source code at github.com/willf/microsoft_ngram.

Installation

Email webngram@microsoft.com and request a token. When you get your token, add it to your .bashrc or .bash_profile:

export NGRAM_TOKEN="YOUR-TOKEN-HERE"

Then install the gem:

gem install microsoft_ngram

Usage

To get a list of currently available models:

>> Bing::Ngram.models
=> ["bing-anchor/jun09/1", "bing-anchor/jun09/2", "bing-anchor/jun09/3", "bing-anchor/jun09/4", "bing-body/jun09/1", "bing-body/jun09/2", "bing-body/jun09/3", "bing-title/jun09/1", "bing-title/jun09/2", "bing-title/jun09/3", "bing-title/jun09/4", "bing-query/jun09/1", "bing-query/jun09/2", "bing-query/jun09/3", "bing-title/apr10/1", "bing-title/apr10/2", "bing-title/apr10/3", "bing-title/apr10/4", "bing-title/apr10/5", "bing-anchor/apr10/1", "bing-anchor/apr10/2", "bing-anchor/apr10/3", "bing-anchor/apr10/4", "bing-anchor/apr10/5", "bing-body/apr10/1", "bing-body/apr10/2", "bing-body/apr10/3", "bing-body/apr10/4", "bing-body/apr10/5"] 

To see the default model:

> MicrosoftNgram.default_model            
=> "bing-body/jun09/3" 

Parameters to the initializer are:

:model => <i>string</i> (sets model)
:user_token => <i>string</i> (sets user token)
:debug => <i>boolean</i> (will show GET/POST calls)

So, to use the 2-gram title model:

> model = MicrosoftNgram.new(:model => "bing-title/jun09/2")

To get a single joint probability, or multiple joint probabilities (If you know you want multiple joint probabilities, it is better to ask for several at once):

> MicrosoftNgram.new.jps(['fish sticks', 'frog sticks'])
=> [["fish sticks", -6.853792], ["frog sticks", -9.91852]] 
> MicrosoftNgram.new.jp("fish sticks")
=> -6.853792 

To get a single conditional probability, or multiple conditional probabilities (If you know you want multiple conditional probabilities, it is better to ask for several at once):

> MicrosoftNgram.new.cp("fish sticks")
=> -2.712575 
> MicrosoftNgram.new.cps(['fish sticks', 'frog sticks'])
=> [["fish sticks", -2.712575], ["frog sticks", -4.788582]] 

To yield the most probable next token using the default model:

> MicrosoftNgram.new.generate("Microsoft Windows",5)  {|x| puts x.join(' ')}
xp -0.6964428
vista -0.9242383
server -1.106876
2000 -1.145312
currentversion -1.168404

To use the query model for the same thing:

> MicrosoftNgram.new(:model => 'bing-query/jun09/3').generate("Microsoft Windows",5)  {|x| puts x.join(' ')}
xp -0.5429792
</s> -1.062959
update -1.08291
vista -1.199022
installer -1.248958

You can also get a list of the N most likely candidates (could be slower for long lists):

> MicrosoftNgram.new(:model => 'bing-query/jun09/3').generate_list("Microsoft Windows",5).each  {|x| puts x.join(' ')}
xp -0.5429792
</s> -1.062959
update -1.08291
vista -1.199022
installer -1.248958 

Sample Script

require 'rubygems'
require 'microsoft_ngram'
l = []
Bing::Ngram.new(:model => "bing-body/apr10/5").generate('a bum',50){ |w,_| l << w }
l.join("; ")

More Info

See the REST API and the terms of use for accessing the Microsoft data.

License

(The MIT License)

Copyright (c) 2010/2011

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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