gini: gini

In PopulationEcologyDivision/bio.survey: Stratified Survey Analysis Tools for DFO Maritimes

Description

gini index of patchniness from a stratified survey (Myers and Cadigan 1995)

Usage

gini(x, y)

Arguments

x	: within strata mean per tow
y	: strata areas in trawlable units

Value

estimate of gini

Author(s)

Adam Cook, [e-mail]

Examples

y=c(2454,	656,	2374,	230,	1221,	619,	172,	2980,	360,	3245,	1016,	2569,	424,	390,	454)
x=c(0,	0,	0,	0,	0,	0.25,	1.81,	2.52,	2.6,	3.68,	7.58,	10.07,	13.33,	13.33,	24.99)
gini(x,y)
#0.453 same as example in http://www.nefsc.noaa.gov/publications/crd/pdfs/crd9605f.pdf

PopulationEcologyDivision/bio.survey documentation built on May 29, 2019, 2:32 p.m.