Bins a global range size (km^2) into an ordered rarity class. Defaults are a
starting point to tune against the v8 range-size distribution.
Usage
rarity_class(
range_km2,
breaks = c(10000, 1e+05, 1e+06),
labels = c("very_rare", "rare", "common", "widespread")
)
Arguments
- range_km2
numeric vector of range sizes (km^2)
- breaks
upper bounds (km^2) between classes (default
c(1e4, 1e5, 1e6))
- labels
ordered class labels (length length(breaks) + 1)
Value
an ordered factor of rarity classes