Get the number of documents or features in an object.

ndoc(x)

nfeat(x)

nfeature(x)

Arguments

x

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

Value

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

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.) nfeature is the deprecated form of nfeat.

See also

ntoken

Examples

# number of documents ndoc(data_corpus_inaugural)
#> [1] 58
ndoc(corpus_subset(data_corpus_inaugural, Year > 1980))
#> [1] 10
ndoc(tokens(data_corpus_inaugural))
#> [1] 58
ndoc(dfm(corpus_subset(data_corpus_inaugural, Year > 1980)))
#> [1] 10
# number of features nfeat(dfm(corpus_subset(data_corpus_inaugural, Year > 1980), remove_punct = FALSE))
#> [1] 3260
nfeat(dfm(corpus_subset(data_corpus_inaugural, Year > 1980), remove_punct = TRUE))
#> [1] 3247