[R-sig-eco] Is there a package that does a G test?

[James Milks]

I have data with the following structure:

Site  Species  #Vines  DBH
1		1		0	12.3
1		1		4	17
1		2		12	48
1		3		1	24
1		3		0	19
2		1		2	15.8
2		2		4	20
2		3		3	30
2		2		9	60
3		3		13	23
3		2		2	44
3		1		0	13

I'm interested in doing a G test to test for differences between  
sites, species, and species within sites using (#Vines / DBH) as the  
dependent variable.  Are there any packages that perform a G test on  
that sort of data?

Thanks in advance.

Jim Milks

Degree Candidate
Environmental Sciences Ph.D. Program
Wright State University
Dayton, OH 45435