This function returns the unique values in a SpatRaster or removes duplicates in a SpatVector.
# S4 method for SpatRaster
unique(x, incomparables=FALSE) # S4 method for SpatVector
unique(x, incomparables=FALSE, ...)
SpatRaster or SpatVector
logical. If FALSE
and x
is a SpatRaster: the unique values are determined for all layers together, and the result is a matrix. If TRUE
, each layer is evaluated separately, and a list is returned. If x
is a SpatVector this argument is as for a data.frame
.
additional arguments passed on to unique
If x
is a SpatRaster: data.frame or list (if incomparables=FALSE
)
If x
is a SpatVector: SpatVector
# NOT RUN {
r <- rast(ncols=5, nrows=5)
values(r) <- rep(1:5, each=5)
unique(r)
s <- c(r, round(r/3))
unique(s)
unique(s,TRUE)
v <- vect(cbind(x=c(1:5,1:5), y=c(5:1,5:1)),
crs="+proj=utm +zone=1 +datum=WGS84")
nrow(v)
u <- unique(v)
nrow(u)
values(v) <- c(1:5, 1:3, 5:4)
unique(v)
# }
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