quanteda (version 0.99.22)

tokens_tolower: convert the case of tokens

Description

tokens_tolower and tokens_toupper convert the features of a tokens object and reindex the types.

Usage

tokens_tolower(x, keep_acronyms = FALSE, ...)
tokens_toupper(x, ...)

Arguments

x

the input object whose character/tokens/feature elements will be case-converted

keep_acronyms

logical; if TRUE, do not lowercase any all-uppercase words (applies only to *_tolower functions)

...

additional arguments passed to stringi functions, (e.g. stri_trans_tolower), such as locale

Examples

# NOT RUN {
# for a document-feature matrix
toks <- tokens(c(txt1 = "b A A", txt2 = "C C a b B"))
tokens_tolower(toks) 
tokens_toupper(toks)
# }