categ

<p>A randomly generated bird SAD dataset where each species has
  been randomly classified according to its origin (native, exotic or
  invasive).</p>

Fits unimodal and multimodal gambin distributions to species-abundance distributions
from ecological data, as in in Matthews et al. (2014) <DOI:10.1111/ecog.00861>.
'gambin' is short for 'gamma-binomial'. The main function is fit_abundances(), which estimates
the 'alpha' parameter(s) of the gambin distribution using maximum likelihood. Functions are
also provided to generate the gambin distribution and for calculating likelihood statistics.

Thomas Matthews

gambin

Fit the Gambin Model to Species Abundance Distributions

Karl Ugland

Colin Gillespie

categ function

<p>A dataframe with three columns: 1) 'abundances' = the abundance of
  each species, 2) 'species' = the species names, and 3) 'status' the species
  origin classification. In regards to (3) each species is classified as
  either native (N), exotic (E) or invasive (I).</p>

categ: Simulated bird SAD dataset with species classification data

Description

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Examples