filterDates {spDates} | R Documentation |
Filter archaeological site coordinates and dates, retaining only the earliest radiocarbon date per site.
filterDates(sites, c14bp)
sites |
A SpatialPointsDataFrame object with archaeological sites and associated radiocarbon ages. |
c14bp |
A string. Name of the field with the radiocarbon ages in C14 BP format. |
A SpatialPointsDataFrame object with the earliest C14 date for every site.