match function

Value matching for Raster* objects

match returns a Raster* object with the position of the matched values. The cell values are the index of the table argument.

%in% returns a logical Raster* object indicating if the cells values were matched or not. methods

match(x, table, nomatch = NA_integer_, incomparables = NULL)

x %in% table

Arguments

• x: Raster* object
• table: vector of the values to be matched against
• nomatch: the value to be returned in the case when no match is found. Note that it is coerced to integer
• incomparables: a vector of values that cannot be matched. Any value in x matching a value in this vector is assigned the nomatch value. For historical reasons, FALSE is equivalent to NULL

Returns

Raster* object

See Also

calc, match

Examples

r <- raster(nrow=10, ncol=10)
values(r) <- 1:100
m <- match(r, c(5:10, 50:55))
n <- r %in% c(5:10, 50:55)