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Flows, networks and subnational data

Source: vignettes/articles/flows-networks-subnational.Rmd
flows-networks-subnational.Rmd

Origin-destination data – trade, migration, remittances – keys on two countries per row. flow_matrix() and country_network() reconcile both ends on the ISO spine; flow_map() and od_map() draw them.

od <- data.frame(from = c("China", "China", "Germany", "United States"),
                 to = c("United States", "Japan", "France", "Mexico"),
                 value = c(500, 200, 80, 300))
flow_matrix(od, from, to, value)
#>     CHN DEU FRA JPN MEX USA
#> CHN   0   0   0 200   0 500
#> DEU   0   0  80   0   0   0
#> FRA   0   0   0   0   0   0
#> JPN   0   0   0   0   0   0
#> MEX   0   0   0   0   0   0
#> USA   0   0   0   0 300   0
flow_map(od, from, to, value)

Great-circle arcs between four pairs of countries.

od_map(od, from, to, value, origins = 2)

One small map per origin, shading each destination by flow.

Below the country, standardize_subnational(), nuts_geometry() and subnational_map() do the same for regions (NUTS in Europe, ISO 3166-2 elsewhere); see their help pages.