Calculate the Index of Relative Rarity for Species Assemblages

This function calculates the Index of Relative Rarity (Irr) for species assemblages based on their occurrences in specific land-use types. It uses the rarity weights calculated from the calc_rarity_weight function.

Usage

calc_rarity(Fin, RW)

Arguments

Fin

A data frame of final species presences, containing columns for cell, species, and Landuse.

RW

A data frame of rarity weights, as calculated by the calc_rarity_weight function.

Value

A data frame containing the Index of Relative Rarity (Irr) for each cell, along with the corresponding land-use type.