Detecting ecological breakpoints: a new tool for piecewise regression
Alessandro Ferrarini
Computational Ecology and Software
ISSN 2220-721X
2011
1(2)
121-124
06/2011
International Academy of Ecology and Environmental Sciences
ecological breakpoints
piecewise regression
rolling regression
moving window regression
GIS
Simple linear regression tries to determine a linear relationship between a given variable X (predictor) and a dependent variable Y. Since most of the environmental problems involve complex relationships, X-Y relationship is often better modeled through a regression where, instead of fitting a single straight line to the data, the algorithm allows the fitting to bend. Piecewise regressions just do it, since they allow emphasize local, instead of global, rules connecting predictor and dependent variables. In this work, a tool called RolReg is proposed as an implementation of Krummel's method to detect breakpoints in regression models. RolReg, which is freely available upon request from the author, could useful to detect proper breakpoints in ecological laws.
DOI 10.0000/issn-2220-721x-compuecol-2011-v1-0014
http://www.iaees.org/publications/journals/ces/articles/2011-1(2)/Detecting-ecological-breakpoints.pdf