Gets the founder ids from a pedigree

Part of Pedigree Curation

Usage

getFounders(ped)

Arguments

ped

a pedigree data.frame with (at least) the columns id, sire, and dam.

Value

A vector of the id values of the founders, in pedigree order. It has the same type as ped$id and is empty when there are no founders.

Details

A founder is an animal whose sire and dam are both unknown (NA). Animals with exactly one known parent (partial parentage) are not founders.

See also

isFounder for the founder logical mask.

Examples

library(nprcgenekeepr)
ped <- data.frame(
  id = c("A", "B", "C", "D", "E", "F", "G"),
  sire = c(NA, NA, "A", "A", NA, "D", "D"),
  dam = c(NA, NA, "B", "B", NA, "E", "E"),
  stringsAsFactors = FALSE
)
getFounders(ped)
#> [1] "A" "B" "E"