Raster::trim can be insanely slow for large files. This alternative, modified slightly from http://blog.snap.uaf.edu/2012/09/10/speeding-up-r-raster-package-trim-function/, runs way faster. But unlike the raster package version there's no guarantee it won't run into memory limitations.
1 | trimFast(x, out = "raster")
|
x |
Raster or matrix. |
out |
Output file format, either "raster", or "matrix". |
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