ba {CTFS} | R Documentation

## Basal Area of Trees

### Description

Two functions that provide calculations of basal area in m^2 from a dbh vector. `ba` computes the basal area and returns a vector of the same length as the input vector. `basum` computes the sum of the basal areas for all values in a vector and returns a single value.

### Usage

    ba(dbh)
    basum(dbh,mindbh=10)

### Arguments

`dbh` | DBH in mm of tree
`mindbh` | minimum dbh for selection of value to be included in computation

### Details

The input is either a single number or a vector of numbers. Valid values are DBH in mm that are greater than or equal to the minimum dbh. If basal area cannot be computed, the value of 0 is returned.

### Value

`ba` returns a vector of the same length as the input DBH vector, basal area in m^2 `basum` returns a single value (numeric), sum of the basal area in m^2

### Author(s)

Rick Condit and Pamela Hall

### See Also

`CTFS.basalarea`

### Examples

    ## Not run:
    ba.out <- ba(tst.bci90.full$dbh)
    basum.out <- basum(tst.bci90.full$dbh)

    ba100.out <- ba(tst.bci90.full[tst.bci90.full$dbh >= 100,]$dbh)
    basum.out <- basum(tst.bci90.full$dbh, mindbh=100)
    ## End(Not run)

[Package CTFS version 1.00 Index]