Pair correlation functions for identifying spatial correlation in discrete domains

Physical Review. E
Enrico GavagninChristian A Yates

Abstract

Identifying and quantifying spatial correlation are important aspects of studying the collective behavior of multiagent systems. Pair correlation functions (PCFs) are powerful statistical tools that can provide qualitative and quantitative information about correlation between pairs of agents. Despite the numerous PCFs defined for off-lattice domains, only a few recent studies have considered a PCF for discrete domains. Our work extends the study of spatial correlation in discrete domains by defining a new set of PCFs using two natural and intuitive definitions of distance for a square lattice: the taxicab and uniform metric. We show how these PCFs improve upon previous attempts and compare between the quantitative data acquired. We also extend our definitions of the PCF to other types of regular tessellation that have not been studied before, including hexagonal, triangular, and cuboidal. Finally, we provide a comprehensive PCF for any tessellation and metric, allowing investigation of spatial correlation in irregular lattices for which recognizing correlation is less intuitive.

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Citations

Nov 28, 2019·Physical Review. E·Stephen ZhangBarry D Hughes
Jul 28, 2020·ELife·Jennifer P OwenChristian A Yates
Aug 17, 2020·Physical Review. E·Alexander Lai De Oliveira, Benjamin J Binder
Apr 20, 2019·Physical Review. E·Stuart T Johnston, Edmund J Crampin
Mar 16, 2021·Journal of the Royal Society, Interface·Jack D HywoodMaté Biro

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