Sums each regions flows to obtain net migration sums.
Usage
sum_net(m, region = 1:dim(m)[1])
Arguments
- m
Matrix of origin-destination flows, where the first and second dimensions correspond to origin and destination respectively.
- region
Integer value corresponding to the region that the net migration sum is desired. Will return sums for all regions by default.
Value
Returns a numeric value of the sum of a single block.
Examples
r <- LETTERS[1:4]
m <- matrix(data = 1:16, nrow = 4, ncol = 4,
dimnames = list(orig = r, dest = r))
m
#> dest
#> orig A B C D
#> A 1 5 9 13
#> B 2 6 10 14
#> C 3 7 11 15
#> D 4 8 12 16
sum_net(m)
#> A B C D
#> -18 -6 6 18