OasisR (version 2.0.1)

ISDuncan: A function to compute Duncan & Duncan segregation index

Description

Duncan's segregation index is one-group form of dissimilarity index DIDuncan and measures the unevenness of a group spatial distribution compared to the rest of the population. It can be interpreted as the share of the group that would have to move to achieve an even distribution, compared to the rest of the population.

Usage

ISDuncan (x)

Arguments

x

- an object of class matrix (or which can be coerced to that class), where each column represents the distribution of a population group, within spatial units. The number of columns should be greater than 1 (at least 2 population groups are required). You should not include a column with total population in each unit, because this will be interpreted as a group.

Value

a numeric vector containing the Duncan's segregation index value for each population group

References

Duncan O. D. and Duncan B. (1955) Residential Distribution and Occupational Stratification. American Journal of Sociology 60 (5), pp. 493-503

See Also

One-group evenness indices: Gini, Atkinson, Gorard, HTheil, 'ISWong, ISMorrill

Between groups dissimilarity indices: DIDuncan, Gini2, DIMorrill, DIWong

Examples

# NOT RUN {
x <- segdata@data[ ,1:2]
ISDuncan(x) 
# }