Ripley's K Function
Natural Resources and Agriculture
Published Online: 15 JAN 2013
Copyright © 2002 John Wiley & Sons, Ltd
Encyclopedia of Environmetrics
How to Cite
Dixon, P. M. 2013. Ripley's K Function . Encyclopedia of Environmetrics. 5.
- Published Online: 15 JAN 2013
Ripley's K function summarizes spatial point process data. It can be used to describe a set of locations, test hypotheses about patterns, and estimate parameters in a spatial point process model. For a stationary point process, K(t) is the expected number of additional points within distance t of a focal point divided by the intensity of the process. A univariate version is used for one set of locations and a multivariate version is used when points can be labeled by a small number of groups. This article reviews the properties of Ripley's K function and two related functions, then illustrates the computation and interpretation using data on the locations of trees in a swamp hardwood forest.
- spatial point process;
- spatial point pattern;
- spatial scale;
- spatial segregation;
- edge effect corrections