migration.gini.out: Out-migration Field Gini Index

Description Usage Arguments Value References See Also Examples

View source: R/gini.R

Description

The Out-migration Field Gini Index is a decomposed version of the Rows Gini Index (migration.gini.row) representing "the contribution of each region's row to the total index" () (migration.gini.total):

G^O_i = \frac{∑_{j \neq i} ∑_{l \neq i,j} | M_{ij} - M_{il} | }{ 2(n-2) ∑_{j \neq k} M_{ij}}

These Gini indices facilitates the direct comparison of different territories without further standardization.

Usage

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  migration.gini.out(m, corrected = TRUE)

Arguments

m

migration matrix

corrected

Bell et al. (2002) updated the formula of Plane and Mulligan (1997) to be 2(n-2) instead of 2(n-1) because "the number of comparisons should exclude the diagonal cell in each row and column, and the comparison of each cell with itself".

Value

A numeric vector with the range of 0 to 1 where 0 means no spatial focusing and 1 shows maximum focusing.

References

See Also

migration.gini migration.gini.in migration.weighted.gini.out

Examples

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migration.indices documentation built on May 29, 2017, 8:43 p.m.