Prune vocabulary
This function filters the input vocabulary and throws out very
frequent and very infrequent terms. See examples in for the
vocabulary function. The parameter vocab_term_max
can
also be used to limit the absolute size of the vocabulary to only the most
frequently used terms.
prune_vocabulary(vocabulary, term_count_min = 1L, term_count_max = Inf, doc_proportion_min = 0, doc_proportion_max = 1, doc_count_min = 1L, doc_count_max = Inf, vocab_term_max = Inf)
vocabulary |
a vocabulary from the vocabulary function. |
term_count_min |
minimum number of occurences over all documents. |
term_count_max |
maximum number of occurences over all documents. |
doc_proportion_min |
minimum proportion of documents which should contain term. |
doc_proportion_max |
maximum proportion of documents which should contain term. |
doc_count_min |
term will be kept number of documents contain this term is larger than this value |
doc_count_max |
term will be kept number of documents contain this term is smaller than this value |
vocab_term_max |
maximum number of terms in vocabulary. |
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