seqTools (version 1.6.0)

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

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).

Value

returns character. char2ascii returns integer.

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).

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"))