Takes a column name, and checks its use as generation numbers. It should name a numeric vector, with values >= 0.
check_tcol(ped, tcol, compute = TRUE, force_int = FALSE)
Vector of generation numbers (if checks are successful)
A dataframe containing the pedigree. Individual (id), maternal (dam), and paternal (sire) identities are mandatory columns.
Name of column with individual generation times. If none is used, the number of equivalent complete generations is computed.
Compute generation numbers if tcol is NULL
Generation numbers must be integers (disabled by default)