Change a categorical layer into one or more numerical layers. With as.numeric you can transfer the active category values to cell values in a non categorical SpatRaster. catalyze transfers all categories to new layers.
# S4 method for SpatRaster
as.numeric(x, index=NULL, filename="", ...)# S4 method for SpatRaster
catalyze(x, filename="", ...)
SpatRaster
positive integer, indicating the column in data.frame value to be used as the category, skipping the first column with the ID. If NULL the active category is used
character. Output filename
additional arguments for writing files as in writeRaster
SpatRaster
# NOT RUN {
set.seed(0)
r <- rast(nrows=10, ncols=10)
values(r) <- sample(3, ncell(r), replace=TRUE) + 10
d <- data.frame(id=11:13, cover=c("forest", "water", "urban"), letters=letters[1:3], value=10:12)
levels(r) <- d
catalyze(r)
activeCat(r) <- 3
as.numeric(r)
# }
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