dg.fx: Function to computes the diameter of the tree of average...

In biometrics: A Package for Biometrics and Modelling

Function to computes the diameter of the tree of average basal area.

Description

Function to compute the diameter of the tree of average basal area (D_{\overline{g}}), which depends on stand density (N) and stand basal area (G). The aforementioned stand diameter is computed as

D_{\overline{g}} = \sqrt{ \frac{G}{N} \frac{k}{pi}}

where the constant k depends on whether the variables are in the units of measurement of the metric or imperial system.

Usage

dg.fx(n = n, g = g, metrics = TRUE)

Arguments

n	is stand tree density. By default the unit of measurement is trees/ha, but if the option 'metrics' is set to FALSE, the unit is trees/acre.
g	is stand basal area. By default the unit of measurement must be entered in m^{2}/ha, but if the option 'metrics' is set to FALSE, the unit must be ft^{2}/ha.
metrics	is a logic value, the default is set to TRUE, thus both variables must be entered in the metric system, i.e., N in 'trees/ha', and G in m^{2}/ha. If metrics is FALSE, N must be in trees/acre, and G in ft^{2}/acre.

Value

Returns the diameter of the tree of average basal area.

Author(s)

Christian Salas-Eljatib.

Examples

##Using the function
dg.fx(n=1000, g=55)
dg.fx(n=210, g=160, metrics=FALSE)

biometrics documentation built on March 20, 2026, 5:09 p.m.