new_fe_ccircle_spatial_notrees: Constructor for the *fe_ccircle_spatial_notrees* Class

In ForestElementsR: Data Structures and Functions for Working with Forest Data

Constructor for the fe_ccircle_spatial_notrees Class

Description

Should be used by expert users only who know exactly what they are doing. Other users please take the function fe_stand for creating an object of that class.

Usage

new_fe_ccircle_spatial_notrees(x = list(), ..., class = character())

Arguments

x	An appropriate list object
...	Additional arguments required for enabling subclasses of fe_ccircle_spatial_notrees
class	A Character string required for enabling subclasses of fe_ccircle_spatial_notrees

Details

The class fe_ccircle_spatial_notrees has been designed for covering a comparably rare case, i.e. an inventory point where no regular trees (trees that are big enough to have a dbh), but possibly small trees are present.

Value

An object of class fe_ccircle_spatial_notrees

Examples

#' # Constructing a minimal fe_ccircle_spatial object from scratch
# Use fe_ccircle_spatial() if you are not absolutely sure

trees <- NULL
tree_positions <- NULL

# define a circle definition with three concentric circles
circle_def <- data.frame(
  dbh_lower = c(0,12,30),
  dbh_upper = c(11.9,29.9,999.0),
  c_area = c(0.0025, 0.0060, 0.0500)
)


# generate a NA dummy for small_trees

  small_trees <- data.frame(
  tree_id = NA_character_,
  species_id = NA_character_,
  layer_key = NA_real_,
  time_yr = NA_real_,
  dbh_cm = NA_real_,
  age_yr = NA_real_,
  height_m = NA_real_
  )

fe_ccircle_spatial_notrees_candidate <- list(
  stand_id = "my_interesting_stand",
  small_trees = small_trees,
  trees = trees,
  circle_definition = circle_def,
  tree_positions = tree_positions,
  time_yr = 2024
)

fe_ccircle_notrees_object <-
new_fe_ccircle_spatial_notrees(fe_ccircle_spatial_notrees_candidate)

# Better validate it
fe_ccircle_notrees_object |> validate_fe_ccircle_spatial_notrees()

ForestElementsR documentation built on April 3, 2025, 7:47 p.m.