activeCat {terra} | R Documentation |
Get or set the active category of a multi-categorical SpatRaster layer
## S4 method for signature 'SpatRaster'
activeCat(x, layer=1)
## S4 replacement method for signature 'SpatRaster'
activeCat(x, layer=1)<-value
x |
SpatRaster |
layer |
positive integer, the layer number or name |
value |
a data.frame (ID, category) |
integer
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
activeCat(r)
activeCat(r) <- 3
activeCat(r)