Hi Peter,
It seems that prestondistr function in vegan package can do what you need
Hope this help
Nicolas
Le Thu, 04 Nov 2010 08:30:15 +0100, Peter Houk <[email protected]> a
écrit:
Greetings -
I'm hoping to compare contemporary coral colony size distributions with
historical datasets reported in technical reports in the late 1980's.
The
reports have only summary statistics (n-number of colonies observed,
x-mean
size, and sd-standard deviation). Assuming the distribution represents
the
truncated log-normal (typically observed for coral colony size data), I'm
trying to generate a population distribution given the known summary
statistics. Generating a simple vector dataset using the rlnorm
function in
R is easy, however I am requesting insight to apply the truncated model,
encompassing all non-zero values and a maximum value of my choosing that
applies to the dataset.
I'd appreciate any insight on the topic,
Peter
*********************************************
Peter Houk, PhD
Marine Biologist
Pacific Marine Resources Institute
www.pacmares.com
www.micronesianfishing.com
--
Nicolas PERU, PhD
33-(0)4 72 43 28 94
06-88-15-23-10
Laboratoire d'Ecologie des Hydrosystèmes Fluviaux
Université Claude Bernard - Lyon 1
43 Bld du 11 novembre 1918
Rdc Bât Forel
69622 VILLEURBANNE cedex FRANCE
