pdb.diff function

Subtract one occurrence data.frame from another, for disentangling overlapping taxonomies or quantifying stem-lineage diversity.

pdb.diff(x, subtract, id_col = x$occurrence_no)

Arguments

• x: Occurrence data from which to subtract.
• subtract: Occurrence data frame or vector of occurrence numbers to subtract from x
• id_col: Vector or column of x containing id to be used for determining which values are also found in subtract or subtract$occurrence_no

Returns

A data.frame() containing the difference between the two occurrence datasets, i.e. all entries that are in x but not in subtract.

Examples

data(archosauria)
pdb.union(rbind(archosauria$Ankylosauria, archosauria$Stegosauria))->Eurypoda
pdb.diff(Eurypoda, subtract=archosauria$Stegosauria)