gtools (version 3.9.5)

asc: Convert between characters and ASCII codes

Description

Convert between characters and ASCII codes

Usage

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

Value

asc returns the integer ASCII values for each character in the elements of char. If simplify=FALSE the result will be a list containing 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.

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

Functions

• asc(): return the characters corresponding to the specified ASCII codes

• chr(): return the ASCII codes for the specified characters.

Author

Adapted by Gregory R. Warnes from code posted by Mark Davis on the 'Data Debrief' blog on 2011-03-09 at https://datadebrief.blogspot.com/2011/03/ascii-code-table-in-r.html.

See Also

strtoi, charToRaw, rawToChar, as.raw

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)