spatialsegregation-package {spatialsegregation} | R Documentation |
Collection of measures of spatial multitype exposure: segregation vs. mingling.
Date: | 2009-03-09 |
License: | GPL v2 or later |
This is a collection of summaries for multitype spatial point patterns (check package 'spatstat' for more info about them). The package is developed for the article Rajala&Illian 2009, and consists of summaries for detecting inter-type forces in the pattern.
See the helps of one of the function for further information how to use the package.
Functions ------------------ segregationFun - General calculation function, please use one of the following: minglingF - Mingling index shannonF - spatial Shannon index simpsonF - spatial Simpson index isarF - ISAR function mingling\_index - shortcut for a single value shannon\_index - -''- simpson\_index - -''- isar\_index - -''-
Tuomas Rajala University of Jyvaskyla, Finland tarajala@maths.jyu.fi
Graz: The behaviour of the species mingling index $m_{sp}$
in relation to species dominance and dispersion. Eur. J. forest research. 123:87-92, 2004.
Lewandowski, Pommerening: Zur Beschreibung der Waldstruktur - Erwartete und beobachtete Arten-Durchmischung. Forstwiss Centralbl, 116:129-139, 1997.
Rajala, Illian: Graph-based description of mingling and segregation in multitype spatial point patterns. To appear 2009.
Reardon, O'sullivan: Measures of spatial segregation. Sociological methodology, 34:121-162, 2004.
Shimatani, Kubota: Quantitative assesment of multispecies spatial pattern with high species diversity. Ecological Research, 19, 2004.
Wiegand, Gunatilleke, Gunatilleke, Huth: How individual species structure diversity in tropical forests. PNAS, nov 16, 2007.