Remove terms from a document-term matrix


This function removes very common and very uncommon words from a document-term matrix.


transform_filter_commons(dtm, term_freq = c(uncommon = 0.001, common = 0.975))



a document-term matrix of class dgCMatrix or dgTMatrix.


numeric vector of 2 values in between 0 and 1. The first element corresponds to frequency of uncommon words; the second element corresponds to the frequency of common words. Terms which are observed less than first value or frequency or more than second will be filtered out.

See Also

prune_vocabulary, transform_tf, transform_tfidf, transform_binary

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