Displaying 1 result from an estimated 1 matches for "platanus".
2007 Aug 13
2
Error message when using zero-inflated count regression model in package zicounts
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