global statistics
Compute global statistics, that is summarized values of an entire SpatRaster.
If x is very large global will fail, except when fun is one of "mean", "min", "max", or "sum".
You can compute a weighted mean or sum by providing a SpatRaster with weights.
## S4 method for signature 'SpatRaster' global(x, fun="mean", weights=NULL, ...)
x |
SpatRaster |
fun |
function to be applied to summarize the values by zone. Either as one of these character values: "max", "min", "mean", "sum", "range", "rms" (root mean square), "sd", "sdpop" (population sd, using n rather than n-1); or, for relatively small SpatRasters, a proper function |
... |
additional arguments passed on to |
weights |
NULL or SpatRaster |
A data.frame with a row for each layer
zonal for "zonal" statistics, and app or Summary-methods for "local" statistics, and extract for summarizing values for polygons. Also see focal for "focal" or "moving window" operations.
r <- rast(ncols=10, nrows=10) values(r) <- 1:ncell(r) global(r, "sum") global(r, "mean", na.rm=TRUE)
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