which_lines: Points Classification through Directional Lines
Description
The function classifies points which appertain to a same directional line.
Usage
which_lines(coords, direction, tolerance = pi / 8)
Arguments
coords
an $n x d$ matrix where each row denotes the $d$-D coordinates of data locations.
direction
a $d$-D numerical vector (or versor) which represents the chosen direction.
tolerance
a numerical value for the tolerance angle (in radians). It's pi/8 by default.
Value
Details
The algorithm used by this function searches the nearest points to a directional line. The function classifies such pairs of points that have the minimum distance and the same direction of the vector $phi$.
This operation is done to order points, so that it's possible to compute mean lengths (mlen) and embedded transition probabilities (embed_MC).
References
Sartore, L. (2010) Geostatistical models for 3-D data. M.Phil. thesis, Ca' Foscari University of Venice.