[R-pkgs] adehabitat version 1.7

Clément Calenge calenge at biomserv.univ-lyon1.fr
Mon Sep 3 09:31:47 CEST 2007

Dear all,

I have uploaded to CRAN the version 1.7 of the package 'adehabitat'. 
Significant changes are listed below:

* The Brownian bridge kernel estimation algorithm has been greatly 
improved. It now takes more than 80% less time than the previous 
version. A new function "liker" has also been added, which estimates the 
one of the two smoothing parameters of the bridge kernel using a maximum 
likelihood approach (recommended in Horn et al., Ecology, in press). 
Examples of the help page demonstrate the use and interest of this 
function. Comparison between kernelbb and the Visual basic algorithm 
provided in the paper of Horn et al. returned consistent results.

* The function kernelUD has also been improved. It now takes more than 
50% less time than the previous version. In addition the "grid" argument 
of this function, now also allows a list of objects of class "asc" to be 
passed as grid where the UD should be estimated.

Happy testing,

Clément Calenge.

LBBE - UMR CNRS 5558 - Université Claude Bernard Lyon 1 - FRANCE
tel. (+33)
fax. (+33)

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