quanteda (version 0.8.2-0)

toLower: Convert texts to lower case

Description

Convert texts or tokens to lower case

Usage

toLower(x, keepAcronyms = FALSE, ...)
## S3 method for class 'character':
toLower(x, keepAcronyms = FALSE, ...)
## S3 method for class 'tokenizedTexts':
toLower(x, keepAcronyms = FALSE, ...)
## S3 method for class 'corpus':
toLower(x, keepAcronyms = FALSE, ...)

Arguments

x

texts to be lower-cased

keepAcronyms

if TRUE, do not lowercase any all-uppercase words

...

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

Value

• Texts tranformed into their lowercased versions. If x is a character vector or a corpus, return a lowercased character vector. If x is a list of tokenized texts, then return a list of lower-cased tokenized texts.

Examples

test1 <- c(text1 = "England and France are members of NATO and UNESCO",
           text2 = "NASA sent a rocket into space.")
toLower(test1)
toLower(test1, keepAcronyms = TRUE)

test2 <- tokenize(test1, removePunct=TRUE)
toLower(test2)
toLower(test2, keepAcronyms = TRUE)