Create an file-backed 'ff' object from a raster, or a raster-enabled file.
ff_object(x, readonly = TRUE, filename = NULL, ...) # S3 method for BasicRaster ff_object(x, readonly = TRUE, filename = NULL, ...) # S3 method for character ff_object(x, readonly = TRUE, filename = NULL, ...)
| x | raster or raster-able file |
|---|---|
| readonly | open in read-only mode (TRUE by default) |
| filename | path to file to create |
| ... | arguments to methods |
`ff` object
When the object is created from a filename, `raster::brick` is used. The 'dim'ension for raster and for ff in this context always keeps degenerate singletons. Please get in touch if this causes you problems.
f <- system.file("extdata", "raster", "sst.grd", package = "ffraster") ff_object(raster::brick(f))#> ff (open) double length=1280 (1280) dim=c(16,8,10) dimorder=c(2,3,1)if (interactive()) { arr <- ff_object(f, filename = "afile.grd") }#> do you want to create a raster and write this object to a new file? #> afile.grd #> 1: Not yet #> 2: I forget #> 3: Yup #> #> Enter an item from the menu, or 0 to exit #> Enter an item from the menu, or 0 to exit #> Enter an item from the menu, or 0 to exit #> Enter an item from the menu, or 0 to exit #> Enter an item from the menu, or 0 to exit #> Enter an item from the menu, or 0 to exit