ba.indiv {CTFS}R Documentation

Basal Area of Individual Trees, including Mulitiple Stems

Description

Computes the basal area (m^2) for each tree including multiple stems if there are any. If a tree has more than one stem, the other stems recorded in the multi-stem file are included in its basal area. Two datasets are used: one with the primary stem and one with all multiple stems for that cenus. The two datasets contain completely non-overlapping sets of DBH. Adding the two together produces the total basal area for each tagged tree.

Usage

ba.indiv(census1, mult1, alivecode=c("A"), mindbh = 10)

Arguments

census1 name of census datafile for a single census, a dataframe
mult1 name of multi-stem file from the same census as
alivecode character, codes of the variable status that indicate the tree is alive. The most general valid categories are: "A" and "AB" and "AS". Default for ba.indiv is "A"
mindbh minimum DBH to determine which trees will be included in computation

Details

See CTFS.basalarea for details on the computation methods of basal area and associated functions.

A tree is included for the computation based on its value for status and dbh for a single census.

Value

Returns a vector of basal areas (m^2) of the same length as census1

Author(s)

Rick Condit, Suzanne Lao, Pamela Hall

See Also

CTFS.basalarea

Examples

## Not run: 
1.  Default use of ba.indiv
ba.indiv.out <- ba.indiv(tst.bci90.full,tst.bci90.mult)

2.  Basal area for trees >= 100 mm only
ba.indiv.out <- ba.indiv(tst.bci90.full,tst.bci90.mult,mindbh=100)
## End(Not run)

[Package CTFS version 1.00 Index]