ISimpson: A function to compute Simpson's interaction index

In OasisR: Outright Tool for the Analysis of Spatial Inequalities and Segregation

Description

Simpson's interaction index measures the probability that randomly selected individuals are not in the same group.

Usage

ISimpson(x)

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.

Value

Simpson's interaction index

References

Simpson E. H. (1949) Measurement of diversity. Nature 163:688

See Also

Social diversity indices: HShannon, NShannon,

Multi-group indices: PMulti, GiniMulti, DMulti, HMulti, CMulti, RelDivers

Examples

x <- segdata@data[ ,1:2]
ISimpson(x) 

OasisR documentation built on July 2, 2020, 3:14 a.m.