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Use a single layer SpatRaster to select cell values from different layers in a multi-layer SpatRaster. The values of the SpatRaster to select layers (y) should be whole numbers between 1 and nlyr(x) (values outside this range are ignored).
See rapp for applying a function to a range of variable size.
See extract for extraction of values by cell, point, or otherwise.
# S4 method for SpatRaster
selectRange(x, y, z=1, repint=0, filename="", ...)SpatRaster
SpatRaster
SpatRaster. Cell values must be positive integers. They indicate the first layer to select for each cell
positive integer. The number of layers to select
integer > 1 and < nlyr(x) allowing for repeated selection at a fixed interval. For example, if x has 36 layers, and the value of a cell in y=2 and repint = 12, the values for layers 2, 14 and 26 are returned
character. Output filename
additional arguments for writing files as in writeRaster
rapp, tapp, extract
r <- rast(ncols=10, nrows=10)
values(r) <- 1
s <- c(r, r+2, r+5)
s <- c(s, s)
set.seed(1)
values(r) <- sample(3, ncell(r), replace=TRUE)
x <- selectRange(s, r)
x <- selectRange(s, r, 3)
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