spatialsegregation-package {spatialsegregation}R Documentation

Spatial Segregation Measures

Description

Collection of measures of spatial multitype exposure: segregation vs. mingling.

Details

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       -   -''-

Author(s)

Tuomas Rajala University of Jyvaskyla, Finland tarajala@maths.jyu.fi

References

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.


[Package spatialsegregation version 1.93 Index]