mk.sptab function

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

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

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()).

Returns

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.

Examples

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