Package nltk :: Package model :: Module api :: Class ModelI

type ModelI

object --+
         |
        ModelI

Known Subclasses:

A processing interface for assigning a probability to the next word.

Instance Methods

__init__(self)
Create a new language model.

source code

prob(self, word, context)
Evaluate the probability of this word in this context.

source code

logprob(self, word, context)
Evaluate the (negative) log probability of this word in this context.

source code

choose_random_word(self, context)
Randomly select a word that is likely to appear in this context.

source code

generate(self, n)
Generate n words of text from the language model.

source code

entropy(self, text)
Evaluate the total entropy of a message with respect to the model.

source code

Method Details

Create a new language model.

Evaluate the total entropy of a message with respect to the model. This is the sum of the log probability of each word in the message.