smalianwob: Calculate the volume without bark of trees using the Smalian...

Description Usage Arguments Value Author(s) References See Also Examples

View source: R/smalianwob.R

Description

Function used to calculate the volume without bark of trees using the Smalian method. This function has integration with dplyr, so it can be used inside a pipe, along with the group_by function.

Usage

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smalianwob(
  df,
  di,
  hi,
  bt,
  tree,
  .groups = NA,
  di_mm_to_cm = FALSE,
  hi_cm_to_m = FALSE,
  bt_mm_to_cm = FALSE
)

Arguments

df

A data frame.

di

Quoted name of the section diameter variable, in centimeters.

hi

Quoted name of the section height variable, in meters

bt

Quoted name of the bark thickness variable, in centimeters.

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.

hi_cm_to_m

Boolean argument that, if TRUE, converts the hi argument from centimeters to meters. Default: FALSE.

bt_mm_to_cm

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

Value

Data frame with volume values by section.

Author(s)

Sollano Rabelo Braga sollanorb@gmail.com

References

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

See Also

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

Examples

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library(forestmangr)
data("exfm7")
head(exfm7)

# Calculate the volume without bark using Smalian's method:
smalianwob(exfm7,"di_wb", "hi", "bark_t", "TREE")

# Using pipes:
library(dplyr)

 exfm7 %>% 
 group_by(TREE) %>% 
 smalianwob("di_wb", "hi", "bark_t")

forestmangr documentation built on Aug. 16, 2021, 5:08 p.m.