paleoDiv (version 0.4.0)

mk.sptab: Generate a taxon-range table based on an occurrence dataset.

Description

Generate a taxon-range table based on an occurrence dataset.

Usage

mk.sptab(
  xx = NULL,
  taxa = xx$tna,
  earliest = xx$eag,
  latest = xx$lag,
  tax = NULL
)

Value

A data.frame() containing the taxon names, the maximum and minimum age for each taxon, and (optionally) a column with the name of the higher-level taxon.

Arguments

xx

A data.frame() of occurrence records, containing at least the following columns: taxonomic name at level at which ranges are to be determined (e.g. species or genus), earliest possible age for each occurrence and latest possible age for each occurrence. If xx==NULL, then each column or vector must be specified individualy using the following parameters

taxa

column/vector containing the taxonomic variable. Defaults to xx$tna

earliest

column/vector containing the earliest age estimate. Defaults to xx$eag.

latest

column/vector containing the latest age estimate. Defaults to xx$lag.

tax

Optional. A single character string containing the taxon name, to be added as another column to the range table (useful for categorization, should several range tables be concatenated, e.g. using rbind()).

Examples

data(archosauria)
mk.sptab(archosauria$Stegosauria)->sptab_Stegosauria