ascii2char: ascii2char: Converting ASCII encoded values to character...

In seqTools: Analysis of nucleotide, sequence and quality content on fastq files

Description

ascii2char calculates character representations for given phred values. char2ascii returns phred values for given ASCII encoded representations (the reverse transformation of ascii2char).

Usage

ascii2char(x, multiple=FALSE)
char2ascii(c)

Arguments

x	numeric. Vector with ASCII values. All values must be in 1:255. Other values produce an error.
multiple	logical. For 'FALSE' (the default), all characters are combined into one single string (i.e. a character vector of length 1). For 'TRUE', single characters are combined into a vector.
c	character. Vector of length 1 (Longer vectors will generate Warnings).

Details

The functions are only wrappers for convenience. char2ascii is defined as strtoi(charToRaw(c), base = 16L). ascii2char is defined as rawToChar(as.raw(x), multiple).

Value

ascii2char returns character. char2ascii returns integer.

Author(s)

Wolfgang Kaisers

References

Ewing B, Green P Base-Calling of Automated Sequencer Traces Using Phred. II. Error Probabilities Genome Research 1998 8(3): 186-194

See Also

getPhredTable

Examples

ascii2char(97:101, multiple=FALSE)
ascii2char(97:101, multiple=TRUE)
char2ascii("abcde")
char2ascii(paste("a", "b", "c", collapse=""))
ascii2char(char2ascii("abcde"))

Example output

Loading required package: zlibbioc
[1] "abcde"
[1] "a" "b" "c" "d" "e"
[1]  97  98  99 100 101
[1] 97 32 98 32 99
[1] "abcde"

seqTools documentation built on Nov. 8, 2020, 5:20 p.m.