migest (version 1.8.5)

sum_od: Extract a classic origin-destination migration flow matrix.

Description

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

Usage

sum_od(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

Matrix from summing over the first and second dimension. Set diagonals to zero.

Returns a matrix object of origin-destination flows

Examples

# NOT RUN {
dn <- LETTERS[1:2]
y <- cm3(row_tot = c(18, 20) * 2, col_tot = 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$n))
round(addmargins(sum_od(y$n))) 
# }