quanteda (version 0.99.12)

ntoken: count the number of tokens or types

Description

Get the count of tokens (total features) or types (unique tokens).

Usage

ntoken(x, ...)
ntype(x, ...)

Arguments

x

a quanteda object: a character, corpus, tokens, or dfm object

...

additional arguments passed to tokens

Value

count of the total tokens or types

Details

The precise definition of "tokens" for objects not yet tokenized (e.g. character or corpus objects) can be controlled through optional arguments passed to tokens through ....

For dfm objects, ntype will only return the count of features that occur more than zero times in the dfm.

Examples

# NOT RUN {
# simple example
txt <- c(text1 = "This is a sentence, this.", text2 = "A word. Repeated repeated.")
ntoken(txt)
ntype(txt)
ntoken(char_tolower(txt))  # same
ntype(char_tolower(txt))   # fewer types
ntoken(char_tolower(txt), remove_punct = TRUE)
ntype(char_tolower(txt), remove_punct = TRUE)

# with some real texts
ntoken(corpus_subset(data_corpus_inaugural, Year<1806), remove_punct = TRUE)
ntype(corpus_subset(data_corpus_inaugural, Year<1806), remove_punct = TRUE)
ntoken(dfm(corpus_subset(data_corpus_inaugural, Year<1800)))
ntype(dfm(corpus_subset(data_corpus_inaugural, Year<1800)))
# }