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Extract zone number \(n\) from the set of all zones.
get_zone(n, zones)
An integer; the number of the zone you wish to retrieve.
A list of integer vectors, representing the set of all zones.
An integer vector.
# NOT RUN { zones <- list(1L, 2L, 3L, 1:2, c(1L, 3L), c(2L, 3L)) get_zone(4, zones) # }
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