untb v1.2-14


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by Robin Hankin

ecological drift under the UNTB

A collection of utilities for biodiversity data. Includes the simulation of ecological drift under Hubbell's Unified Neutral Theory of Biodiversity, and the calculation of various diagnostics such as Preston curves.

Functions in untb

Name Description
isolate Randomly select a subset of an ecosystem
etienne Etienne's sampling formula
logkda Etienne's K(D,A)
census Construct, coerce, and test for a census object
display.untb Animation of neutral ecological drift
extractor Extract rows of a database in count form
species.count Ecosystem diagnostics for output of untb()
fisher Various functionality to implement Fisher's logseries
summary.count Summary methods for count and census objects
sahfos Biodiversity dataset provided by SAHFOS
plot.count Abundance curves
volkov Expected frequency of species
preston Preston diagram of an ecosystem
rand.neutral Random neutral ecosystem
untb-package Unified neutral theory of biodiversity
simpson Simpson's diversity index
vallade Various functions from Vallade and Houchmandzadeh
logS1 logarithms of Stirling numbers of the first kind
print.preston Print and plot objects of class Preston
phi Hubbell's phi
optimal.prob Returns an estimate of the fundamental biodiversity number
butterflies abundance data for butterflies
saunders Dataset due to Saunders
print.summary.count Print method for summary objects
zsm Zero sum multinomial distribution as derived by McKane
theta.prob Posterior probabilities for theta
expected.abundance Expected abundances under the neutral model
copepod Copepod data supplied by Phil Pugh
+.count Add two count objects
no.of.ind Ecosystem diagnostics
alonso Various functions from Alonso and McKane 2004
count Construct, coerce, and test for a count object
untb Ecological drift simulation under the Unified Neutral Theory of Biodiversity
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Last month downloads


Type Package
Date 2005-10-26
SystemRequirements PARI/GP >= 2.3.0 [strongly recommended for logkda()]
License GPL
Packaged Tue Apr 17 22:50:27 2007; rksh

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