I have used the fourthcorner function as suggest by dray and legendre (model 2 and 4 then combine). I plot the combined value with plot(four.comb, type="G"). What do the colors mean? I have both grey and black bars.
many thanks,

Stephen

--
Stephen Sefick
**************************************************
Auburn University
Biological Sciences
331 Funchess Hall
Auburn, Alabama
36849
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sas0...@auburn.edu
http://www.auburn.edu/~sas0025
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Let's not spend our time and resources thinking about things that are so little 
or so large that all they really do for us is puff us up and make us feel like 
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being mammals.

                                -K. Mullis

"A big computer, a complex algorithm and a long time does not equal science."

                              -Robert Gentleman

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