Description Usage Arguments Value Author(s) References Examples
This is the implementation of the spatial decomposition of the Gini coefficient introduced by Rey and Smith (2013). The function calculates the global Gini and the two components of the spatial Gini: the inequality among nearest (geographically) neighbours and the inequality of non-neighbours. Three weighted schemes are currently supported: binary, bi-square and row standardised bi-square.
1 | spGini(Coords, Bandwidth, x, WType = 'Binary')
|
Coords |
a numeric matrix or vector or data frame of two columns giving the X,Y coordinates of the observations (data points or geometric / population weighted centroids) |
Bandwidth |
a positive integer that defines the number of nearest neighbours for the calculation of the weights |
x |
a numeric vector of a variable |
WType |
a string giving the weighting scheme used to compute the weights matrix. Options are: "Binary", "Bi-square", "RSBi-square". Default is "Binary". Binary: weight = 1 for distances less than or equal to the distance of the furthest neighbour (H), 0 otherwise; Bi-square: weight = (1-(ndist/H)^2)^2 for distances less than or equal to H, 0 otherwise; RSBi-square: weight = Bi-square weights / sum (Bi-square weights) for each row in the weights matrix |
Returns a list of five values Gini, gwGini, nsGini, gwGini.frac, nsGini.frac
Gini |
Global Gini |
gwGini |
First component of the spatial Gini: the inequality among nearest (geographically) neighbours |
nsGini |
Second component of the spatial Gini: the inequality among non-neighbours |
gwGini.frac |
The fraction of the first component of the spatial Gini |
nsGini.frac |
The fraction of the second component of the spatial Gini |
Stamatis Kalogirou <stamatis@lctools.science>
Rey, S.J., Smith, R. J. (2013) A spatial decomposition of the Gini coefficient, Letters in Spatial and Resource Sciences, 6 (2), pp. 55-70.
Kalogirou, S. (2015) Spatial Analysis: Methodology and Applications with R. [ebook] Athens: Hellenic Academic Libraries Link. ISBN: 978-960-603-285-1 (in Greek). https://repository.kallipos.gr/handle/11419/5029?locale=en
1 2 3 4 5 6 | data(GR.Municipalities)
Coords1<-cbind(GR.Municipalities@data$X, GR.Municipalities@data$Y)
Bandwidth1<-12
x1<-GR.Municipalities@data$Income01
WType1<-'Binary'
spGini(Coords1,Bandwidth1,x1,WType1)
|
Loading required package: reshape
Loading required package: weights
Loading required package: Hmisc
Loading required package: lattice
Loading required package: survival
Loading required package: Formula
Loading required package: ggplot2
Attaching package: 'Hmisc'
The following objects are masked from 'package:base':
format.pval, units
Loading required package: gdata
sh: 1: cannot create /dev/null: Permission denied
gdata: Unable to locate valid perl interpreter
gdata:
gdata: read.xls() will be unable to read Excel XLS and XLSX files
gdata: unless the 'perl=' argument is used to specify the location of a
gdata: valid perl intrpreter.
gdata:
gdata: (To avoid display of this message in the future, please ensure
gdata: perl is installed and available on the executable search path.)
sh: 1: cannot create /dev/null: Permission denied
gdata: Unable to load perl libaries needed by read.xls()
gdata: to support 'XLX' (Excel 97-2004) files.
gdata: Unable to load perl libaries needed by read.xls()
gdata: to support 'XLSX' (Excel 2007+) files.
gdata: Run the function 'installXLSXsupport()'
gdata: to automatically download and install the perl
gdata: libaries needed to support Excel XLS and XLSX formats.
Attaching package: 'gdata'
The following object is masked from 'package:stats':
nobs
The following object is masked from 'package:utils':
object.size
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startsWith
Loading required package: mice
Attaching package: 'mice'
The following objects are masked from 'package:base':
cbind, rbind
Loading required package: pscl
Classes and Methods for R developed in the
Political Science Computational Laboratory
Department of Political Science
Stanford University
Simon Jackman
hurdle and zeroinfl functions by Achim Zeileis
Loading required package: MASS
Gini gwGini nsGini gwGini.frac nsGini.frac
0.145501498 0.003420536 0.142080961 0.023508599 0.976491401
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