function to change strand

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Description

Changes strand in gwaa.data-class object

Usage

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	patch_strand(data,snpid,strand,based_on="snpnames", quiet = TRUE)

Arguments

data

gwaa.data or snp.data object

snpid

vector of ids of snsp (name or position)

strand

vector of strands ("+","-","u")

based_on

either "snpnames" or "map" depending on what info is provided by snpid

quiet

indicates if recoding report should be directed to the screen

Details

For SNPs, as identified by 'snpid', changes strand to strand specified by 'strand'

Value

object of gwaa.data or snp.data class

Author(s)

Yurii Aulchenko

Examples

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require(GenABEL.data)
data(srdta)
as.character(srdta@gtdata@strand[1:20])
a <- patch_strand(srdta,srdta@gtdata@snpnames[1:10],rep("+",10))
as.character(a@gtdata@strand[1:20])
a <- patch_strand(srdta,srdta@gtdata@map[1:10],rep("+",10),based_on="map")
as.character(a@gtdata@strand[1:20])

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