search for: treeht

Displaying 1 result from an estimated 1 matches for "treeht".

2008 Mar 03
1
Tapply for Group Specific Means and Proportions
...taken (e.g., height in meters, behavior class in 2 letter code). Observation numbers varied between individual (ranging from 1 observation for each date-time combo to >50) I am trying to summarize the data into 1 row per individual-date-time combination. I used tapply to pull mean height (TreeHt) out for each date-time combo. However, all my attempts to get the proportion of times a specific behavior category occurs within the same date-time combo have failed thus far having tried tapply, aggregate, table (because Behavior is a factor), etc.-- likely I probably did not search the rig...