DiamClass: Diameter Class Assignment

In ryanmismith/inventoryfunctions: Forestry Inventory Functions

Diameter Class Assignment

Description

This function assigns each tree a diameter class

Usage

DiamClass(Tree, DBH, Convert = FALSE, Binwidth = 1)

Arguments

Tree	The Tree ID for each Tree.
DBH	The unique Plot ID for each Plot.
Convert	Change units from metric to English
Binwidth	Size of bins for diameter classes

Details

This function will return a diameter class value for each tree. If the data is in metric for other parts of the analysis, but will be finallyu reported in english, set Convert to TRUE, otherwise it will return values in the unit supplied. Binwidth determines the binwidth for the diameter classes. The default value is one but the bin width can be changed to whatever is desired.

Class sizes will use (bin1 + bin2)/2 as the break between bins. for example if binwidth is 2, all values greater than (3 + 5)/2 will be 5, etc.

This function is primarily for visualizing diameter distributions. Useful for examining stand structure and exploring appropriate silvicultural treatments. Maximum bin = 100.

The first bin will always have a value of 1.

Value

Returns diameter class for each tree

Examples

Tree <- seq(1,15,1)
DBH <- c(10,13,5,16,7,10,1,44,4,7,30,70,18,15,18)
data <- data.frame(Tree, DBH)

mapply(DiamClass,data$Tree, data$DBH)
mapply(DiamClass,data$Tree, data$DBH, TRUE)
mapply(DiamClass,data$Tree, data$DBH, Binwidth = 2)
mapply(DiamClass,data$Tree, data$DBH, TRUE, 3)
mapply(DiamClass,data$Tree, data$DBH, Binwidth = 5)
mapply(DiamClass,data$Tree, data$DBH, Convert = TRUE, Binwidth = 2)

ryanmismith/inventoryfunctions documentation built on Aug. 5, 2022, 2:22 a.m.