huberwb {forestmangr}

Calculate the volume with bark of trees using the Huber method

Description

Function used to calculate the volume with bark of trees using the Huber method. This function has integration with dplyr, so it can be used inside a pipe, along with the group_by function.

Usage

huberwb(df, di, section_length, tree, .groups = NA, di_mm_to_cm = FALSE)

Arguments

df

A data frame.

di

Quoted name of the section diameter variable, in centimeters.

section_length

Quoted name of the section length variable, in meters

tree

Quoted name of the tree variable. used to differentiate the trees' sections. If this argument is NA, the defined groups in the data frame will be used. Default: NA.

.groups

Optional argument. Quoted name(s) of additional grouping variables that can be added to differentiate subdivisions of the data. If this argument is NA, the defined groups in the data frame will be used. Default: NA.

di_mm_to_cm

Boolean argument that, if TRUE, converts the di argument from milliliters to centimeters. Default: FALSE.

Value

Data frame with volume values by section.

Author(s)

Sollano Rabelo Braga [e-mail]

References

Campos, J. C. C. and Leite, H. G. (2017) Mensuracao Florestal: Perguntas e Respostas. 5a. Vicosa: UFV.

See Also

Complementary functions: huberwob, For calculation of volume without bark using the Huber method, smalianwb, for calculation of volume with bark using the Smalian method, smalianwob, for calculation of volume without bark the Smalian method.

Examples

library(forestmangr)
data("exfm8")
head(exfm8)

# Calculate the volume with bark using the Huber method:
huberwb(exfm8,"di_wb", "sec_length", "TREE")

# Using pipes:
library(dplyr)

 exfm8 %>% 
 group_by(TREE) %>% 
 huberwb("di_wb", "sec_length")