selectRange function

Select the values of a range of layers, as specified by cell values in another SpatRaster

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 signature 'SpatRaster'
selectRange(x, y, z=1, repint=0, filename="", ...)

Arguments

• x: SpatRaster
• y: SpatRaster. Cell values must be positive integers. They indicate the first layer to select for each cell
• z: positive integer. The number of layers to select
• repint: 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
• filename: character. Output filename
• ...: additional arguments for writing files as in writeRaster

Returns

SpatRaster

See Also

rapp, tapp, extract

Examples

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)