raster_focal: Wrapper for 'raster::focal' on 'stars' objects

In michaeldorman/geobgu: Utility Functions and Datasets for the Department of Geography at BGU

Description

This is a wrapper around raster::focal, to apply the function on stars objects without needing to convert to and from a Raster* object.

Usage

raster_focal(x, w, fun, na.rm = FALSE)

Arguments

x	A stars object
w	A matrix of weights (the moving window), e.g. a 3 by 3 matrix with values 1
fun	A function. The function fun should take multiple numbers, and return a single number
na.rm	If TRUE, NA will be removed from focal computation. Default is FALSE

Value

A stars object with the filtered output

Examples

library(stars)
tif = system.file("tif/L7_ETMs.tif", package = "stars")
r = read_stars(tif)
r = r[, , , 1:2]
w = matrix(1, ncol = 7, nrow = 7)
r_focalmean7 = raster_focal(r, w, mean)
plot(r)
plot(r_focalmean7)

michaeldorman/geobgu documentation built on Jan. 6, 2021, 3:57 p.m.