R.temis (version 0.1.3)

frequent_terms: frequent_terms

Description

List terms with the highest number of occurrences in the document-term matrix of a corpus, possibly grouped by the levels of a variable.

Usage

frequent_terms(dtm, variable = NULL, n = 25)

Arguments

dtm

A DocumentTermMatrix.

variable

An optional vector of values giving the groups for which most frequent terms should be reported.

n

The maximal number of terms to report (for each group, if applicable).

Value

A list of matrices, one for each level of the variable, with columns:

• "\

• "\ (rather than in other levels).

• "Global \

• "Level": the number of occurrences of the term in the level ("internal").

• "Global": the number of occurrences of the term in the corpus.

• "t value": the quantile of a normal distribution corresponding the probability "Prob.".

• "Prob.": the probability of observing such an extreme (high or low) number of occurrences of the term in the level, under an hypergeometric distribution.

Examples

# NOT RUN {
file <- system.file("texts", "reut21578-factiva.xml", package="tm.plugin.factiva")
corpus <- import_corpus(file, "factiva", language="en")
dtm <- build_dtm(corpus)
frequent_terms(dtm)
frequent_terms(dtm, meta(corpus)$Date)

# }