migest (version 1.3)

fm: Extract a Classic Origin-Destination Migration Flow Matrix.

Description

Extract a classic origin-destination migration flow matrix from a more detailed disaggregation of flows stored in an (array) object.

Usage

fm(y)

Arguments

y

Array of origin-destination matrices, where the first and second dimensions correspond to origin and destination respectively. Higher dimension(s) refer to additional migrant characteristic(s).

Value

• Returns a matrix object of origin-destination flows

Details

Sums over the first and second dimension and removes counts on diagonals.

Examples

dn <- LETTERS[1:2]
y <- cm3(rtot = c(18, 20) * 2, ctot = c(16, 22) * 2, 
        m = array(c(5, 1, 2, 7, 4, 2, 5, 9), dim = c(2, 2, 2), 
        dimnames = list(orig = dn, dest = dn, type = c("ILL", "HEALTHY"))))
round(addmargins(y$N))
round(addmargins(fm(y$N)))