Description Details Author(s) References Examples
Collection of measures or summaries of spatial multitype exposure: segregation vs. mingling of different types of points in a plane.
This is a collection of summaries for multitype spatial point patterns (see package spatstat for more).
The package is developed for an article Rajala\&Illian 2010, and provides summaries for detecting simple inter-type effects in the pattern.
See the help of the functions for further information.
Package provides an example dataset object called exposurepps
, documented separately.
Also, the Dixon bivariate test based on contingency tables is available.
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segregationFun - General calculation function, please use one of the following wrappers:
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 - -''-
dixon - Dixon's 2-type contingency table tests
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Tuomas Rajala tuomas.rajala@iki.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: A family of spatial biodiversity measures based on graphs, Env. Ecol. Stat. 2012
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.
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