Calculates signals sent from reference regions to point records.
signalCalculation(ref_reg, pts, biogeo = TRUE)
The data.frame of species occurrences with extra columns containing the location ID and presence signals for each point. If biogeo=TRUE, the data.frame also includes the nativeness and alienness indices.
a list of shapefiles containing checklist regions as "presence", "native", and "alien" categories. These can be original checklists, or checklists derived from range maps.
data.frame containing the point records and their coordinates.
logical, whether the biogeographical status indices should be calculated or not. Default is true, however at least the native reference regions must be included in the data.