:class:`nltk.IBMModel4`
=======================
.. currentmodule:: nltk
.. autoclass:: IBMModel4
   :undoc-members:


Methods
-------
.. autosummary::
   :toctree:


   ~IBMModel4.__init__
   ~IBMModel4.best_model2_alignment
   ~IBMModel4.hillclimb
   ~IBMModel4.init_vocab
   ~IBMModel4.maximize_distortion_probabilities
   ~IBMModel4.maximize_fertility_probabilities
   ~IBMModel4.maximize_lexical_translation_probabilities
   ~IBMModel4.maximize_null_generation_probabilities
   ~IBMModel4.model4_prob_t_a_given_s
   ~IBMModel4.neighboring
   ~IBMModel4.prob_of_alignments
   ~IBMModel4.prob_t_a_given_s
   ~IBMModel4.reset_probabilities
   ~IBMModel4.sample
   ~IBMModel4.set_uniform_probabilities
   ~IBMModel4.train





Attributes
----------
.. autosummary::
  :toctree:


   ~IBMModel4.MIN_PROB