pdb.union function

Form the union of two occurrence data.frames or remove duplicates from occurrence data.frame. Useful if parts of a clade are not included in the downloaded dataset and need to be added separately.

pdb.union(x, id_col = x$occurrence_no)

Arguments

• x: Concatenated occurrence data.frames to be merged
• id_col: Vector or column of x containing id to be used for determining which values contain occurrence numbers to be used for matching entries

Returns

A data.frame() containing the first entry for each unique occurrence to be represented in x.

Examples

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