complement: Complement of a DNA/RNA Sequence

In spgs: Statistical Patterns in Genomic Sequences

Complement of a DNA/RNA Sequence

Description

Compute the complement of a DNA or RNA sequence.

Usage

## Default S3 method:
complement(x, content=c("dna", "rna"), 
case=c("lower", "upper", "as is"), ...)
## S3 method for class 'SeqFastadna'
complement(x, ...)
## S3 method for class 'list'
complement(x, ...)

Arguments

x	A character vector, an object that can be coersed to a character vector or a list of objects that canbe be converted to character vectors. this argument can also be a SeqFastadna object provided by the seqinr package.
content	The content type of sequence(s). At present, supported types include “dna” and “rna”. the default type is “dna”.
case	Determines how symbols in x should be treated before translating them into their complements. “lower”, the default behaviour, converts all symbols to lowercase while “upper” converts them to uppercase. “as is” allows the symbols to pass unchanged so that the case of each output symbol matches that of the corresponding input symbol.
...	Arguments to be passed from or to other functions.

Details

If x is a SeqFastadna object or a character vector in which each element is a single nucleobase, then it represents a single sequence and its complementary sequence will be returned in the same form.

On the other hand, if x is a vector of character strings, each of which represents a nucleic sequence, then the result will bea a character vector in which each element contains the complement of the corresponding element in x as a character string.

Value

According to the input x, a character vector, SeqFastadna object or list containing the complement(s) of the sequence(s) in x.

Author(s)

Andrew Hart and Servet Martínez

See Also

reverseComplement

Examples

complement("actg")
complement(c("t", "g", "a"))

#List of sequences
some.dna <- list("atgcgtcgttaa", c("g", "t", "g", "a", "a", "a"))
complement(some.dna)

#RNA sequence example
complement(c("a", "u", "g"), content="rna")

#Examples of lowercase, uppercase and as-is conversion
mixed.case <- c("t", "G", "g", "C", "a")
complement(mixed.case)
complement(mixed.case, case="upper")
complement(mixed.case, case="as is")

spgs documentation built on Oct. 3, 2023, 5:07 p.m.