R scripts for calculation of changes in tree structural parameters

by Ekaterina Bogdanovich
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1_tree_choose_voxR

		-voxelization of tree canopies, calculation of number of voxels (volume) for each tree in data set

2_selection_of_GQ_trees

		-filtering of the trees with good scanning quality (percentage change in number of volels less than 15%)
		-calculation of the persentage change in tree structural parameters

3_GQ_difference_tree_metrics

		-summary table

4_separate_data_by_treatment
		
		-changes and summary grouped by treatment: 
			CT_P - prunned trees, 
			CT_nP - control trees, 
			NT - nitrogen treatment, 
			NPT - nitrogen phosphorus treatment

5_stat_tables

		-changes in tree parameters, comparison by treatment
		-summary tables
		-wilcoxon test
		-t test
		-tukey test

5a_stat_tables_metric
		
		-tree parameters, comparison by treatment
		-test of normality (Shapiro)
		-ANOVA and Tukey


6_biometric relationships
		
		-relationships of changes in tree parameters
		-relationships all tree parameters together (pruned excluded)

packages - required packages

functions - user-defined functions

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generated in framework of master thesis and manuscript

Bogdanovich et al.
"Using Terrestrial Laser Scanning for characterizing tree structural parameters 
and their changes under different management in a Mediterranean open woodland"

Bogdanovich, E.
Master thesis
"Retrieval of structural properties of vegetation in a Mediterranean ecosystem using TLS"
http://www.clib-jena.mpg.de/theses/bgc/BGC18002.pdf