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% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/utf8.R
\name{utf8_width}
\alias{utf8_width}
\title{Measure the Character String Width}
\usage{
utf8_width(x, ..., encode = TRUE, quote = FALSE, utf8 = NULL)
}
\arguments{
\item{x}{character object.}
\item{...}{These dots are for future extensions and must be empty.}
\item{encode}{whether to encode the object before measuring its width.}
\item{quote}{whether to quote the object before measuring its width.}
\item{utf8}{logical scalar indicating whether to determine widths assuming a
UTF-8 capable display (ASCII-only otherwise), or \code{NULL} to format for
output capabilities as determined by \code{output_utf8()}.}
}
\value{
An integer object, with the same \code{names}, \code{dim}, and
\code{dimnames} as \code{x}.
}
\description{
Compute the display widths of the elements of a character object.
}
\details{
\code{utf8_width()} returns the printed widths of the elements of a character
object on a UTF-8 device (or on an ASCII device when \code{output_utf8()} is
\code{FALSE}), when printed with \code{utf8_print()}. If the string is not
printable on the device, for example if it contains a control code like
\code{"\\n"}, then the result is \code{NA}. If \code{encode = TRUE}, the
default, then the function returns the widths of the encoded elements via
\code{utf8_encode()}); otherwise, the function returns the widths of the
original elements.
}
\examples{
# the second element is encoded in latin-1, but declared as UTF-8
x <- c("fa\u00E7ile", "fa\xE7ile", "fa\xC3\xA7ile")
Encoding(x) <- c("UTF-8", "UTF-8", "bytes")
# get widths
utf8_width(x)
utf8_width(x, encode = FALSE)
utf8_width('"')
utf8_width('"', quote = TRUE)
}
\seealso{
\code{\link[=utf8_print]{utf8_print()}}.
}
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