`nltk.BigramCollocationFinder`¶

class nltk.BigramCollocationFinder(word_fd, bigram_fd, window_size=2)[source]¶: A tool for the finding and ranking of bigram collocations or other association measures. It is often useful to use from_words() rather than constructing an instance directly.

Methods¶

`__init__`(word_fd, bigram_fd[, window_size])	Construct a BigramCollocationFinder, given FreqDists for appearances of words and (possibly non-contiguous) bigrams.
`above_score`(score_fn, min_score)	Returns a sequence of ngrams, ordered by decreasing score, whose scores each exceed the given minimum score.
`apply_freq_filter`(min_freq)	Removes candidate ngrams which have frequency less than min_freq.
`apply_ngram_filter`(fn)	Removes candidate ngrams (w1, w2, ...) where fn(w1, w2, ...) evaluates to True.
`apply_word_filter`(fn)	Removes candidate ngrams (w1, w2, ...) where any of (fn(w1), fn(w2), ...) evaluates to True.
`from_documents`(documents)	Constructs a collocation finder given a collection of documents, each of which is a list (or iterable) of tokens.
`from_words`(words[, window_size])	Construct a BigramCollocationFinder for all bigrams in the given sequence.
`nbest`(score_fn, n)	Returns the top n ngrams when scored by the given function.
`score_ngram`(score_fn, w1, w2)	Returns the score for a given bigram using the given scoring function.
`score_ngrams`(score_fn)	Returns a sequence of (ngram, score) pairs ordered from highest to lowest score, as determined by the scoring function provided.