R: Convert the case of tokens

tokens_tolower {quanteda} | R Documentation

## Convert the case of tokens

### Description

`tokens_tolower()` and `tokens_toupper()` convert the features of a tokens object and re-index 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)

### Examples

    # for a document-feature matrix
    toks <- tokens(c(txt1 = "b A A", txt2 = "C C a b B"))
    tokens_tolower(toks)
    tokens_toupper(toks)

[Package quanteda version 3.0.0 Index]