create_unique_tree_id for each individual tree over different years

This function creates a unique ID for each tree, that allows to group (f.e. by use of `make_table_wide()`) all given information on the life stages of an individual tree during different measures.

create_unique_tree_id(data_dendro)

Arguments

data_dendro

dataframe on tree measures with variables plot_id, plottype, tree_measure_id, date_dendro, dbh_mm, height_m, species, alive_dead, decaystage, period, OldID, year, subcircle, plotarea_ha,... (output of function load_data_dendrometry())

Value

a dataset with 1 record per tree measurement, containing the given data of each tree in different years (= data_dendro) and a link to a unique tree_id.

Examples

if (FALSE) {
#change path before running
library(forrescalc)
data_dendro <-
  load_data_dendrometry("C:/MDB_BOSRES_selectieEls/FieldMapData_MDB_BOSRES_selectieEls.accdb")
create_unique_tree_id(data_dendro)
}