bdCharacter
to all lower case or all upper case.
casefold(cv, upper=F) tolower(x) toupper(x)
bdVector
of values to be converted.
This will be coerced to mode character (through
as.character
).
TRUE
, all characters are converted to upper case.
FALSE
, all characters are converted to lower case.
bdCharacter
with all letters translated
to either lower case
(if
upper=F
) or upper case (if
upper=T
).
Characters in
cv
that are not letters are not changed.
Attributes of
cv
are lost in the output.
The
toupper
and
tolower
functions are
frontend functions to
casefold
with the appropriate
value for
upper
set.
casefold(LETTERS) tolower(LETTERS) # same as previous line casefold(letters, upper=T) toupper(letters) # same as previous line