[R] Request for help
Michela Marignani
michela.marignani at uniroma1.it
Thu Jan 27 09:51:54 CET 2005
My name is Michela Marignani and I'm an ecologist trying to solve a problem
linked to knight' s tour algorithm.
I need a program to create random matrices with presence/absence (i.e. 1,0
values), with defined colums and rows sums, to create null models for
statistical comparison of species distribution phenomena.
I've seen on the web many solutions of the problem, but none provides the
freedom to easily change row+colums constraint and none of them produce
matrices with 1 and 0. Also, I've tryied to use R, but it is too
complicated for a not-statistician as I am....can you help me?
Thank you for your attention,
so long
Michela Marignani
University of Siena
Environmental Science Dept.
Siena, Italy
michela.marignani at uniroma1.it
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