Transform IUCN RedList conservation status to continuous values

Transform IUCN RedList conservation status to continuous values ranging from 0 to 5.

Usage

lets.iucncont(x, dd = NA, ne = NA)

Arguments

x: A vector or a matrix containing IUCN codes to be transformed.
dd: The value to be attributed to DD (data-deficient) species, the default option is NA.
ne: The value to be attributed to NE (not-evaluated) species, the default option is NA.

Value

Returns a vector/matrix with continuos values from 0 to 5.

EX and EW = 5

CR = 4

EN = 3

VU = 2

NT = 1

LC = 0

DD = NA

NE = NA

References

Purvis A et al., 2000. Predicting extinction risk in declining species. Proceedings of the Royal Society of London. Series B: Biological Sciences, 267.1456: 1947-1952.

Author

Bruno Vilela

Examples

if (FALSE) { # \dontrun{
#Vector transformation
status <- sample(c("EN","VU", "NT", "CR", "DD", "LC", "EX"), 
                 30, replace = TRUE) 
transV <- lets.iucncont(status)

#matrix transformation
data(IUCN)
transM <- lets.iucncont(IUCN)

} # }