How to replace NA's in a raster object

Question

I need to replace the NA\'s in the raster object (r) from the example below.

library(raster)
filename <- system.file(\"external/test         


        

Answer 1

A more memory safe approach (for large files) would be to use reclassify:

library(raster)
filename <- system.file("external/test.grd", package="raster")
r <- raster(filename)
rna <- reclassify(r, cbind(NA, 250))