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Compute the weighted mean for each cell of the layers of a SpatRaster. The weights can be spatially variable or not.
# S4 method for SpatRaster,numeric
weighted.mean(x, w, na.rm=FALSE, filename="", ...)# S4 method for SpatRaster,SpatRaster
weighted.mean(x, w, na.rm=FALSE, filename="", ...)
SpatRaster
SpatRaster
A vector of weights (one number for each layer), or for spatially variable weights, a SpatRaster with weights (should have the same extent, resolution and number of layers as x)
Logical. Should missing values be removed?
character. Output filename
options for writing files as in writeRaster
Summary-methods, weighted.mean
b <- rast(system.file("ex/logo.tif", package="terra"))
# give least weight to first layer, most to last layer
wm1 <- weighted.mean(b, w=1:3)
# spatially varying weights
# weigh by column number
w1 <- init(b, "col")
# weigh by row number
w2 <- init(b, "row")
w <- c(w1, w2, w2)
wm2 <- weighted.mean(b, w=w)
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