finches


Occurrence data for 13 species from 17 sites. Columns are sites, rows are species. 1's are presences and 0's are absences.


datasets

This R package applies the probabilistic model of species co-occurrence (Veech 2013) to a set of species distributed among a set of survey or sampling sites. The algorithm calculates the observed and expected frequencies of co-occurrence between each pair of species. The expected frequency is based on the distribution of each species being random and independent of the other species. The analysis returns the probabilities that a more extreme (either low or high) value of co-occurrence could have been obtained by chance. The package also includes functions for visualizing species co-occurrence results and preparing data for downstream analyses.

Daniel Griffith

cooccur

Probabilistic Species Co-Occurrence Analysis in R

finches function

A data frame with 13 observations on the following 17 variables.

finches: Finch occurrence data from (Sanderson 2000).

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