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ndoc

Count the number of documents or features

Description

Get the number of documents or features in an object.

Usage

ndoc(x)

nfeat(x)

Arguments

x

a quanteda object: a corpus, dfm, or tokens object, or a readtext object from the readtext package.

Details

ndoc returns the number of documents in an object whose texts are organized as "documents" (a corpus, dfm, or tokens object, a readtext object from the readtext package).

nfeat returns the number of features from a dfm; it is an alias for ntype when applied to dfm objects. This function is only defined for dfm objects because only these have "features". (To count tokens, see ntoken().)

Value

an integer (count) of the number of documents or features

See Also

Examples

# number of documents
ndoc(data_corpus_inaugural)
ndoc(corpus_subset(data_corpus_inaugural, Year > 1980))
ndoc(tokens(data_corpus_inaugural))
ndoc(dfm(tokens(corpus_subset(data_corpus_inaugural, Year > 1980))))

# number of features
toks1 <- tokens(corpus_subset(data_corpus_inaugural, Year > 1980), remove_punct = FALSE)
toks2 <- tokens(corpus_subset(data_corpus_inaugural, Year > 1980), remove_punct = TRUE)
nfeat(dfm(toks1))
nfeat(dfm(toks2))
quanteda

Quantitative Analysis of Textual Data

v3.0.0
GPL-3
Authors
Kenneth Benoit [cre, aut, cph] (<https://orcid.org/0000-0002-0797-564X>), Kohei Watanabe [aut] (<https://orcid.org/0000-0001-6519-5265>), Haiyan Wang [aut] (<https://orcid.org/0000-0003-4992-4311>), Paul Nulty [aut] (<https://orcid.org/0000-0002-7214-4666>), Adam Obeng [aut] (<https://orcid.org/0000-0002-2906-4775>), Stefan Müller [aut] (<https://orcid.org/0000-0002-6315-4125>), Akitaka Matsuo [aut] (<https://orcid.org/0000-0002-3323-6330>), William Lowe [aut] (<https://orcid.org/0000-0002-1549-6163>), Christian Müller [ctb], European Research Council [fnd] (ERC-2011-StG 283794-QUANTESS)
Initial release

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