add.Inds: Function to add missing individuals to a pedigree
Description
Function add.Inds() adds missing individuals to a pedigree and returns the
complete pedigree as a data.frame with the same headers as the
original pedigree. Remeber to check for errors beforehand with
function errors.ped. Unknown parents should be coded as NA.
Usage
add.Inds(ped)
Value
data.frame of three columns with identical header as input.
Arguments
ped
data.frame with three columns: id,id parent1,id parent2