Find relatives amongst samples from their ancestor vectors

Given the ancestry vectors of a collection of individuals (like the set of all sampled individuals from a simulation) this function just figures out who is a relative of whom. Relatives are defined as individuals that share at least one ID within their ancestry vectors. The way this function works is by, for each ID, making a vector of all the other IDs that include that original ID in its ancestry vectors. Then, for each individual, these vectors are catenated (one for each ancestor) then values are made unique and sorted, and returned in a list column of relatives.

relatives_from_ancestry_vectors(A)

Arguments

A

a tibble that has columns of ID and ancestors. ID is the ID of the individual and ancestors is a list column that holds ancestry vectors.

Value

This function returns the original input, A, with an additional list column called relatives, that includes vectors of the samples that each sample is related to.