Hi all,

do you know if is available in R a code to perform the 'similarity profile'
(SIMPROF) test? At the moment it is implemented in PRIMER package (v6, K.R.
Clarke and R.N. Gorley, PRIMER v6: User Manual/Tutorial. PRIMER-E, Plymouth
(2006). 

The manual describes it as:

"Tests for structure in the data. First a resemblance profile is determined
by ranking the resemblance matrix for the data. A mean profile is then
calculated by randomising the order of each variables values and
re-calculating the profile. The pi statistic is calculated as the deviation
of the actual data profile with the mean one. This is compared with the
deviations of further randomly generated profiles to test for significance.
(Null hypothesis is no structure so randomisation allowed)"

A more detailed description is provided here: 

CLARKE KR, SOMERFIELD PJ, GORLEY RN (2008) Exploratory null hypothesis
testing for community data: similarity profiles and biota-environment
linkage. J Exp Mar Biol Ecol 366, 56-69 

I appreciate suggestions of comparable methods as well,

thanks in advance,

regards

David Armanini

David G. Armanini,

Post-doctoral Research Fellow,

Environment Canada @ Canadian Rivers Institute,

Department of Biology

10 Bailey Drive, PO Box 4400

University of New Brunswick

Fredericton, New Brunswick

Canada  E3B 5A3

Tel: +1-506-453-5151 / Fax: +1-506-452-6271

email: darmanin@unb.ca

skype: david.armanini

webpage:
http://www.unb.ca/research/institutes/cri/people/postdocs/armanini/index.htm
l

http://publicationslist.org/david.armanini

 


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