title: Quantifying spatial structure in experimental observations and agent-based simulations using pair-correlation functions.
abstract: We define a pair-correlation function that can be used to characterize spatiotemporal patterning in experimental images and snapshots from discrete simulations. Unlike previous pair-correlation functions, the pair-correlation functions developed here depend on the location and size of objects. The pair-correlation function can be used to indicate complete spatial randomness, aggregation, or segregation over a range of length scales, and quantifies spatial structures such as the shape, size, and distribution of clusters. Comparing pair-correlation data for various experimental and simulation images illustrates their potential use as a summary statistic for calibrating discrete models of various physical processes.
authors.affiliation: School of Mathematical Sciences, University of Adelaide, South Australia 5005, Australia.
authors.forename: Benjamin J
authors.initials: BJ
authors.lastname: Binder
authors.forename: Matthew J
authors.initials: MJ
authors.lastname: Simpson
mesh_terms: D007091:Image Processing, Computer-Assisted; D008962:Models, Theoretical; D062211:Spatio-Temporal Analysis