nltk_lite.probability.MLEProbDist

Package nltk_lite :: Module probability :: Class MLEProbDist

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Type MLEProbDist

object --+    
         |    
 ProbDistI --+
             |
            MLEProbDist

The maximum likelihood estimate for the probability distribution of the experiment used to generate a frequency distribution. The maximum likelihood estimate approximates the probability of each sample as the frequency of that sample in the frequency distribution.

Method Summary
	`__init__(self, freqdist)` Use the maximum likelihood estimate to create a probability distribution for the experiment used to generate `freqdist`.
`string`	`__repr__(self)` Return a string representation of this `ProbDist`.
`FreqDist`	`freqdist(self)` Return the frequency distribution that this probability distribution is based on.
any	`max(self)` Return the sample with the greatest probability.
float	`prob(self, sample)` Return the probability for a given sample.
`list`	`samples(self)` Return a list of all samples that have nonzero probabilities.
Inherited from `ProbDistI`: `logprob` Inherited from `object`: `__delattr__`, `__getattribute__`, `__hash__`, `__new__`, `__reduce__`, `__reduce_ex__`, `__setattr__`, `__str__`

Method Details

init(self, freqdist)
(Constructor)

Use the maximum likelihood estimate to create a probability distribution for the experiment used to generate freqdist.

Parameters:: freqdist - The frequency distribution that the probability estimates should be based on.
(type=FreqDist)

Overrides:: nltk_lite.probability.ProbDistI.__init__

repr(self)
(Representation operator)

Returns:: A string representation of this ProbDist.
(type=string)

Overrides:: __builtin__.object.__repr__

freqdist(self)

Returns:: The frequency distribution that this probability distribution is based on.
(type=FreqDist)

max(self)

Returns:: the sample with the greatest probability. If two or more samples have the same probability, return one of them; which sample is returned is undefined.
(type=any)

Overrides:: nltk_lite.probability.ProbDistI.max (inherited documentation)

prob(self, sample)

Parameters:: sample - The sample whose probability should be returned.
(type=any)

Returns:: the probability for a given sample. Probabilities are always real numbers in the range [0, 1].
(type=float)

Overrides:: nltk_lite.probability.ProbDistI.prob (inherited documentation)

samples(self)

Returns:: A list of all samples that have nonzero probabilities. Use prob to find the probability of each sample.
(type=list)

Overrides:: nltk_lite.probability.ProbDistI.samples (inherited documentation)

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