search for: negundo

...in order to compare between this transect and other transects as well as to compare between segments of the same transect. Are there any R packages out there that will allow me make those calculations? To give an idea of my data, here's a fictional example: Species X (m) Y(m) Acer negundo 90.10 -.19 Acer negundo 90.14 -.90 Acer saccharinum 90.25 .54 Acer rubrum 90.89 .21 Acer negundo 91.25 .36 Acer negundo 91.46 -.65 etc. Thanks. Jim Milks

I have data on number of vines per tree for ~550 trees. Over half of the trees did not have any vines and the data is fairly skewed (median = 0, mean = 1.158, 3rd qu. = 1.000). I am attempting to investigate whether plot location (four sites), species (I'm using only the four most common species), or tree dbh has a significant influence on the number of vines per tree. When I