Atkinson {OasisR} | R Documentation |
A function to compute Atkinson segregation index
Description
The spatial version of Atkinson inequality index is based on Lorenz curves. The user can decide wich part of the curve contributes more to the index, by choosing the value of the shape parameter, delta.
Usage
Atkinson (x, delta = 0.5)
Arguments
x |
an object of class matrix (or which can be coerced to that class), where each column represents the distribution of a group within spatial units. The number of columns should be greater than 1 (at least 2 groups are required). You should not include a column with total population, because this will be interpreted as a group. |
delta |
an inequality aversion parameter |
Value
A numeric vector containing Atkinson's segregation index values for each group
References
James, D. and K. E. Taeuber (1985) Measures of Segregation. Sociological Methodology 15, pp. 1-32
See Also
One-group evenness indices:
ISDuncan
, Gini
, Gorard
,
HTheil
, 'ISWong
, ISMorrill
,
ISMorrillK
Between groups dissimilarity indices:
DIDuncan
, Gini2
,
DIMorrill
, DIMorrillK
, DIWong
Examples
x <- segdata@data[ ,7:8]
Atkinson(x)
Atkinson(x, 0.1)
Atkinson(x, delta = 0.9)