R: Class for “no quote” Printing of Character Strings

noquote {base} | R Documentation

## Class for “no quote” Printing of Character Strings

### Description

Print character strings without quotes.

### Usage

    noquote(obj)

    ## S3 method for class 'noquote':
    print(x, ...)

    ## S3 method for class 'noquote':
    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 (`"..."`).

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

### Author(s)

Martin Maechler maechler@stat.math.ethz.ch

### 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)

[Package base version 2.8.1 Index]