SOMNiBUS: Smooth modeling of bisulfite sequencing

#' A simulated methylation dataset based on a real data.
#'
#' A dataset containing methylation levels on one targeted region on chromosome
#' 4 near gene BANK1 from cases with rheumatoid arthritis (RA) and controls.
#'
#' This example data include methylation levels of cell type separated blood
#' samples of 22 rheumatoid arthritis (RA) patients and 21 healthy individuals.
#' In the data set, 123 CpG sites are measured and there are 25 samples from
#' circulating T cells and 18 samples from monocytes.
#'
#' It should be noted that this data example is only for illustration purposes. 
#' The forward and reverse reads were not merged in this dataset.
#' Try not to overinterpret the results of this simple example.
#' @format A data frame of 5289 rows and 6 columns. Each row represents a CpG
#' site for a sample. Columns include in order:
#' \describe{
#'  \item{Meth_Counts}{Number of methylated reads}
#'  \item{Total_Counts}{Total number of reads; read-depth}
#'  \item{Position}{Genomic position (in bp) for the CpG site}
#'  \item{ID}{indicates which sample the CpG site belongs to}
#'  \item{T_cell}{whether a sample is from T cell or monocyte}
#'  \item{RA}{whether a sample is an RA patient or control}
#' }
#' @source simulation is based a real data set provided by 
#' Dr. Marie Hudson (McGill University).
"RAdat"