Description Usage Arguments Value Author(s)
Summarizes mean and lorry's height by cluster for standing trees, standing + live trees, and standing
+ live + non-broken top trees.
The function is improved version to calculate mean height in vol_ha_2017.sas
by outputing lorey's
height.
For both fixed and variable area plots, the function computes mean height by using plot weight (PLOT_WT
)
weighted height. For lorey's height computation, the function treats variable and fixed area plots differently.
Specifically, the function uses the mean height as lorey's height for variable plots,
while uses height that weighted both by plot weight (PLOT_WT
) and basal area (BA_TREE
)
for fixed area plots.
1 2 3 4 | heightSmry_byC(treeMC)
## S4 method for signature 'data.table'
heightSmry_byC(treeMC)
|
treeMC |
data.table, Compiled tree-level data that contains both measured trees and counted trees. |
A table contains computed mean height MN or MEAN
and lorey's height LRY
for all standing trees ALL
,
standing and live trees 1
and standing and non-broken top trees 2
. The output is equevalent
to height
table in original compiler.
Yong Luo
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.