# untb v1.4-2

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## 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 | |

fisher | Various functionality to implement Fisher's logseries | |

expected.abundance | Expected abundances under the neutral model | |

etienne | Etienne's sampling formula | |

print.summary.count | Print method for summary objects | |

logS1 | logarithms of Stirling numbers of the first kind | |

volkov | Expected frequency of species | |

simpson | Simpson's diversity index | |

saunders | Dataset due to Saunders | |

phi | Hubbell's phi | |

alonso | Various functions from Alonso and McKane 2004 | |

species.count | Ecosystem diagnostics for output of untb() | |

no.of.ind | Ecosystem diagnostics | |

plot.count | Abundance curves | |

count | Construct, coerce, and test for a count object | |

preston | Preston diagram of an ecosystem | |

vallade | Various functions from Vallade and Houchmandzadeh | |

optimal.prob | Returns an estimate of the fundamental biodiversity number | |

bci | Barro Colorado Island (BCI) dataset | |

logkda | Etienne's K(D,A) | |

sahfos | Biodiversity dataset provided by SAHFOS | |

rand.neutral | Random neutral ecosystem | |

theta.prob | Posterior probabilities for theta | |

butterflies | abundance data for butterflies | |

summary.count | Summary methods for count and census objects | |

untb-package | Unified neutral theory of biodiversity | |

untb | Ecological drift simulation under the Unified Neutral Theory of Biodiversity | |

extractor | Extract rows of a database in count form | |

copepod | Copepod data supplied by Phil Pugh | |

print.preston | Print and plot objects of class Preston | |

display.untb | Animation of neutral ecological drift | |

zsm | Zero sum multinomial distribution as derived by McKane | |

census | Construct, coerce, and test for a census object | |

+.count | Add two count objects | |

isolate | Randomly select a subset of an ecosystem | |

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## Last month downloads

## Details

Type | Package |

Date | 2009-26-02 |

SystemRequirements | PARI/GP >= 2.3.0 [strongly recommended for logkda()] |

License | GPL |

URL | http://www.r-project.org |

Packaged | Thu Mar 19 20:32:39 2009; rksh |

Repository | CRAN |

Date/Publication | 2009-03-30 06:47:08 |

depends | Brobdingnag , partitions |

Contributors | Robin S. Hankin |

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