casefold
Convert Case of Character Strings
Description
Translate letters in a vector of character strings
to all lower case or all upper case.
Usage
casefold(x, upper = FALSE)
tolower(x)
toupper(x)
Arguments
| x |
a vector of values to be converted.
This is coerced to mode character.
|
| upper |
a logical flag. If TRUE, all characters are converted to upper case.
If FALSE (the default), all characters are converted to lower case.
|
Details
Characters in x that are not letters are not changed.
Attributes of x are lost in the output unless x is of mode character.
Value
a character vector with all letters translated
to either lower case
(if upper=FALSE) or upper case (if upper=TRUE).
See Also
Examples
casefold(LETTERS)
tolower(LETTERS) # same as previous line
casefold(letters, upper=T)
toupper(letters) # same as previous line