ncol(x)
nrow(x)
ncell(x)
ncol(x) <- value
nrow(x) <- value
rowcol(x) <- value
extent
, resolution
r <- raster()
ncell(r)
ncol(r)
nrow(r)
dim(r)
nrow(r) <- 18
ncol(r) <- 36
# equivalent to
rowcol(r) <- c(18, 36)
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