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asc

Convert between characters and ASCII codes

Description

asc returns the ASCII codes for the specified characters. chr returns the characters corresponding to the specified ASCII codes.

Usage

asc(char, simplify=TRUE)
  chr(ascii)

Arguments

`char`	vector of character strings
`simplify`	logical indicating whether to attempt to convert the result into a vector or matrix object. See `sapply` for details.
`ascii`	vector or list of vectors containing integer ASCII codes

Value

asc returns the integer ASCII values for each character in the elements of char. If simplify=FALSE the result will be a list continuing one vector per element of char. If simplify=TRUE, the code will attempt to convert the result into a vector or matrix.

asc returns the characters corresponding to the provided ASCII values.

Author(s)

Adapted by Gregory R. Warnes greg@warnes.net from code posted on the 'Data Debrief' blog on 2011-03-09 at http://datadebrief.blogspot.com/2011/03/ascii-code-table-in-r.html.

Examples

## ascii codes for lowercase letters
  asc(letters)

  ## uppercase letters from ascii codes
  chr(65:90)

  ## works on muti-character strings
  ( tmp <- asc('hello!') )
  chr(tmp)

  ## Use 'simplify=FALSE' to return the result as a list
  ( tmp <- asc('hello!', simplify=FALSE) )
  chr(tmp)

  ## When simplify=FALSE the results can be...
  asc( c('a', 'e', 'i', 'o', 'u', 'y' ) ) # a vector
  asc( c('ae', 'io', 'uy' ) )             # or a matrix

  ## When simplify=TRUE the results are always a list...
  asc( c('a', 'e', 'i', 'o', 'u', 'y' ), simplify=FALSE )
  asc( c('ae', 'io', 'uy' ), simplify=FALSE)

gtools

Various R Programming Tools

v3.8.2

GPL-2

Authors

Gregory R. Warnes, Ben Bolker, and Thomas Lumley

Initial release

2020-03-23

asc