Change the absolute path of a file

convertPaths is simply a wrapper around gsub for changing the first part of a path. convertRasterPaths is useful for changing the path to a file-backed raster (e.g., after copying the file to a new location).

convertPaths(x, patterns, replacements)

convertRasterPaths(x, patterns, replacements)

Arguments

x	For convertPaths, a character vector of file paths. For convertRasterPaths, a disk-backed RasterLayer object, or a list of such rasters.
patterns	Character vector containing a pattern to match (see ?gsub).
replacements	Character vector of the same length of patterns containing replacement text (see ?gsub).

Examples

filenames <- c("/home/user1/Documents/file.txt", "/Users/user1/Documents/file.txt")
oldPaths <- dirname(filenames)
newPaths <- c("/home/user2/Desktop", "/Users/user2/Desktop")
convertPaths(filenames, oldPaths, newPaths)
#> [1] "C:/home/user2/Desktop/file.txt"  "C:/Users/user2/Desktop/file.txt"

r1 <- raster::raster(system.file("external/test.grd", package = "raster"))
r2 <- raster::raster(system.file("external/rlogo.grd", package = "raster"))
rasters <- list(r1, r2)
oldPaths <- system.file("external", package = "raster")
newPaths <- file.path("~/rasters")
rasters <- convertRasterPaths(rasters, oldPaths, newPaths)
lapply(rasters, raster::filename)
#> [[1]]
#> [1] "C:/Eliot/rasters/test.grd"
#> 
#> [[2]]
#> [1] "C:/Eliot/rasters/rlogo.grd"
#>