
Hi Bob,
I think the Rcmdr gui plus the BiodiversityR package (has a nice freely available manual with forestry examples: http://www.worldagroforestry.org/treesandmarkets/tree_diversity_analysis.asp ) could make getting started with R a lot easier for what you want to do.
 
These packages are “addons” that provide additional functions and will also load a whole bunch of extra packages so be patient and you will need a good internet connection!
 
Plus I also saw this book coming out in 2011: “Forest Analytics with R An Introduction”.( http://www.springer.com/statistics/life+sciences,+medicine+%26+health/book/978-1-4419-7761-8 )
Good luck.
Darren 		 	   		  
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