Classify countries and territories

Predicate helpers that return a logical vector aligned with the input.

Usage

is_sids(x)

is_snij(x)

is_small_island(x)

Arguments

x

A character vector of ISO codes or country names.

Value

A logical vector the same length as x.

Details

Inputs are resolved in three passes: direct match against the iso_code column of islands, then a case-insensitive match against name, then a fallback through countrycode from "country.name" to "iso2c". Unresolved entries return NA.

Hyphenated codes ("BQ-BO" for Bonaire, "BQ-SE" for Sint Eustatius, "BQ-SA" for Saba) are accepted directly. Bare "BQ" is ambiguous within the bundled dataset; pass the specific island code or the country name instead.

Examples

is_sids(c("Aruba", "Curacao", "Bonaire", "Brazil"))
#> [1]  TRUE  TRUE FALSE FALSE
is_snij(c("Aruba", "Curacao", "Bonaire", "Brazil"))
#> [1]  TRUE  TRUE  TRUE FALSE
is_small_island(c("AW", "CW", "BQ-BO", "BR", "AX"))
#> [1]  TRUE  TRUE  TRUE FALSE  TRUE