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zipf
====
My little NLP library, supposed to make _my_ work a little easier and less redundant.
The .gem can be found here: https://rubygems.org/gems/zipf
bleu.rb : BLEU implementation, also per-sentence-BLEU
dag.rb : implementation of a directed acyclic graph and various algorithms
fileutil.rb : file utilities
grammar.rb : classes to model grammars (mostly for translation grammars)
hg.rb : data structures and algorithms (viterbi currently) for hypergraphs
misc.rb : misc. stuff (e.g. monkey patches for Array and String)
semirings.rb : semirings (used in dags.rb)
SparseVector.rb : sparse vectors for ruby, based on Hash class
stringutil.rb : string utilities
tfidf.rb : functions to calculate tf/ntf/idf
Translation.rb : an object for
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