getB: Extract methylation Beta values.
In ENmix: Quality control and analysis tools for Illumina DNA methylation BeadChip

Description Usage Arguments Value Author(s) Examples

Extract Methylation Beta value, Beta = Meth / (Meth + Unmeth + offset)

1	getB(mdat,type="Illumina",offset=100)

`mdat`	An object of class `methDataSet` or `MethylSet`.
`type`	type="Illumina" sets offset=100 as per Genome Studio software.
`offset`	Regularization factor in calculating beta ratio, 100 in default

Methylation Beta value = Meth / (Meth + Unmeth + offset). Meth is methylated intensity matrix, Unmeth is unmethylated intensity matrix.

Zongli Xu

if (require(minfiData)){
path <- file.path(find.package("minfiData"),"extdata")
rgSet <- readidat(path = path,recursive = TRUE)
mdat=getmeth(rgSet)
beta=getB(mdat,"Illumina")
}