add_geometry            Add geometric features to a LAS object
add_las_attributes      Add all las_attributes from las@data to the
                        header of a las element
add_voxel_coordinates   Add voxel coordinates to a las file
comparative_shortest_path
                        helper function for csp_cost_segemntation
csp_cost_segmentation   Comparative Shortest Path with cost weighting
                        tree segmentation
eigen_decomposition     Fast Eigenvalues decomposition for k nearest
                        neighbors using a C++ function
fast_unlist             helper function to unlist IDs generated by
                        dbscan::frNN
fast_unlist_dist        helper function to unlist distances computed by
                        dbscan::frNN
fds                     Farthest Distance Sampling (Farthest Point
                        Sampling)
find_base_coordinates_geom
                        Find stem base position using a geometric
                        feature filtering and clustering approach
find_base_coordinates_raster
                        Find stem base position using a density raster
                        approach
forest_inventory        Function to perform a forest inventory based on
                        a segmented las object (needs to contain
                        TreeID)
forest_inventory_simple
                        Function to perform a forest inventory based on
                        a segmented las object (needs to contain
                        TreeID) This version is a faster but more
                        simplistic approach than forest_inventory() for
                        the DBH estimates
las_merge               Makes one las-object from multiple las-objects
p_dist                  Point distance function
p_mat_dist              Point distance function
plot_inventory          Function to plot the inventory results into a
                        lidR 3d plot of the point cloud
point_center_angle      Returns the angle between the center of the
                        circle and a point in degrees
point_circle_distance   Helper function to compute distances from a
                        point to the circle
ransac_circle_fit       RANSAC circle fitting algorithm specially
                        adapted for tree DBH estimation
suppress_cat            Suppress only the cat() output
voxelize_points_mean_attributes
                        helper function to voxelize a las element
