Identifies the founders in a pedigree

Part of Pedigree Curation

Usage

isFounder(ped)

Arguments

ped

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

Value

A logical vector with one element per row of ped that is TRUE for each animal whose sire and dam are both NA. The result never contains NA.

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

getFounders for the founder id values.

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
)
isFounder(ped)
#> [1]  TRUE  TRUE FALSE FALSE  TRUE FALSE FALSE