migration.gini.col {migration.indices} | R Documentation |
Columns Gini Index
Description
The Columns Gini index concentrates on the "relative extent to which the destination selections of in-migrations are spatially focused":
This implementation solves the above formula by computing the dist
matrix for each columns.
Usage
migration.gini.col(m)
Arguments
m |
migration matrix |
Value
A number between 0 and 1 where 0 means no spatial focusing and 1 shows maximum focusing.
References
David A. Plane and Gordon F. Mulligan (1997) Measuring Spatial Focusing in a Migration System. Demography 34, 251–262
See Also
migration.gini.row
migration.gini.col.standardized
Examples
data(migration.hyp)
migration.gini.col(migration.hyp) # 0.05555556
migration.gini.col(migration.hyp2) # 0.04166667
[Package migration.indices version 0.3.1 Index]