untb v1.3-3


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


Type Package
Date 2007-06-07
SystemRequirements PARI/GP >= 2.3.0 [strongly recommended for logkda()]
License GPL
URL http://www.r-project.org
Packaged Fri Jan 16 18:05:16 2009; rksh

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