“…These matrices include: The frequency matrix; Euclidean-distance matrix (ED); graph theoretical distance matrix (GD); line distance matrix (LD); quotient matrix (D/D, M/M, L/L); and their "higher order" matrices [1,2,12,13,20,21,27,29,30]. Among them, ED, GD, L/L, etc., are derived from a graphical representation.…”