base (version 3.3)

noquote: Class for ‘no quote’ Printing of Character Strings

Description

Print character strings without quotes.

Usage

noquote(obj)
"print"(x, ...)
"c"(..., recursive = FALSE)

Arguments

obj

any R object, typically a vector of character strings.

x

an object of class "noquote".

...

further options passed to next methods, such as print.

recursive

for compatibility with the generic c function.

Details

noquote returns its argument as an object of class "noquote". There is a method for c() and subscript method ("[.noquote") which ensures that the class is not lost by subsetting. The print method (print.noquote) prints character strings without quotes ("\dots").

These functions exist both as utilities and as an example of using (S3) class and object orientation.

See Also

methods, class, print.

Examples

letters
nql <- noquote(letters)
nql
nql[1:4] <- "oh"
nql[1:12]

cmp.logical <- function(log.v)
{
  ## Purpose: compact printing of logicals
  log.v <- as.logical(log.v)
  noquote(if(length(log.v) == 0)"()" else c(".","|")[1 + log.v])
}
cmp.logical(stats::runif(20) > 0.8)