wnodf: Calculate Almeida-Neto and Ulrich's nestedness index

In MBI: (M)ultiple-site (B)iodiversity (I)ndices Calculator

Description

Calculate Almeida-Neto and Ulrich's nestedness index, can handle both abundance and occurrence situations automatically

Usage

wnodf(data)

Arguments

data	rows of the data are sites, while columns of the data are species

Author(s)

Youhua Chen <[e-mail]>

References

Chen Y (2012) MBI: an R package for calculating multiple-site biodiversity indices. Submitted.

Almeida-Neto M, Ulrich W (2011) A straightforward computational approach for measuring nestedness using quantitative matrices. Environmental Modelling and Software, 26, 173-178.

Almeida-Neto M, Guimaraes P, Guimaraes P, Loyola R, Ulrich W (2008) A consistent metric for nestedness analysis in ecological systems: reconciling concept and measurement. Oikos, 117, 1227-1239.

See Also

batch.calculation

Examples

test<-c(90,30,11,5,100,46,19,70,19,1,
        17,0,0,0,30,4,20,26,12,5,37,
		0,25,0,60,30,29,42,36,19,32,
		12,0,0,50,6,39,35,18,0,35,0,
		28,0,70,35,56,49,42,0,81,15,
		36,0,90,45,72,63,54,9,13,0,
		0,5,20,1,4,0,0,0,0,0,0,0,10,
		0,0,0,41,4,72,24,7,0,80,1,64,
		56,48,0,36,0,29,0,40,32,32,2,0,0)
test<-matrix(test,10,10)
wnodf(test)

Example output

$total
[1] 44.70679

$column
[1] 43.35185

$row
[1] 46.06173

MBI documentation built on May 2, 2019, 4:19 a.m.