This is a simplified version of base::merge()
useful for merging
additional data into a '>BGData object while keeping the order of the
data in the '>BGData object.
orderedMerge(x, y, by = c(1L, 2L))
Data frame
Data frame
Specifications of the columns used for merging. Defaults to the first two columns of the data frame, which traditionally has the family ID and the individual ID.
Merged data frame