snipR: Pedigree deduplication

#' Simulated family pedigrees
#'
#' A data set containing family pedigrees, in which some families have duplicates.
#' The data represent pedigrees that are ascertained based on family history, and
#' include information on cancer statuses and ages, genetic testing results, etc.
#' Each family has a FamID; duplicate families will have the same FamID. 
#' Each family has a unique RequestID. Hence, the goal of the algorithm is to
#' detect the duplicates, or the families with the same FamID. Within a family,
#' each individual has an ID, and the MotherID and FatherID represent the ID of
#' the mother and father, respectively. A portion of the data set is provided below.
#' The data is mostly in the format for running the Mendelian model
#' PanelPRO (https://projects.iq.harvard.edu/bayesmendel/panelpro).
#'
#' @docType data
# 
#' @format A data frame with 207,214 rows and 32 variables:
#' \describe{
#'   \item{ID}{ID for the family member}
#'   \item{Sex}{1 for males, 0 for females}
#'   \item{MotherID}{ID for reported mother}
#'   \item{FatherID}{ID for reported father}
#'   \item{isProband}{1 for proband, 0 otherwise}
#'   \item{isAff*}{Cancer status (BC = breast cancer, OC = ovarian cancer,
#'   COL = colorectal cancer, ENDO = endometrial cancer, PANC = pancreatic cancer,
#'   MELA = melanoma)}
#'   \item{Age*}{Cancer age (BC = breast cancer, OC = ovarian cancer,
#'   COL = colorectal cancer, ENDO = endometrial cancer, PANC = pancreatic cancer,
#'   MELA = melanoma)}
#'   \item{isDead}{Death status}
#'   \item{BRCA1}{BRCA1 testing results (1 = positive, 2 = negative, 0 = untested)}
#'   \item{BRCA2}{BRCA2 testing results (1 = positive, 2 = negative, 0 = untested)}
#'   \item{MLH1}{MLH1 testing results (1 = positive, 2 = negative, 0 = untested)}
#'   \item{MSH2}{MSH2 testing results (1 = positive, 2 = negative, 0 = untested)}
#'   \item{MSH6}{MSH6 testing results (1 = positive, 2 = negative, 0 = untested)}
#'   \item{CDKN2A}{CDKN2A testing results (1 = positive, 2 = negative, 0 = untested)}
#'   \item{Twins}{Twin marker (twins in the family will have the same positive integer)}
#'   \item{FamID}{True ID for the family}
#'   \item{RequestID}{Reported ID for the family (true duplicates will have a different
#'   RequestID but the same FamID)}
#'   \item{Duplicate}{1 if the pedigree has a duplicate}
#'   \item{nDuplicates}{Number of duplicate pedigrees of the family}
#'   \item{relationship}{Relationship to proband}
#'   \item{famSize}{Number of family members in the family}
#' }
"pedigrees"