File extensions map

Source: R/load.R, R/save.R

How to load various types of files in R.

This function has two roles:

  1. to proceed with the loading of files that are in a simList; or

  2. as a shortcut to simInit(inputs = filelist).

A data.frame with information on how to load various types of files in R, containing the columns:

  • exts: the file extension;

  • fun: the function to use for files with this file extension;

  • package: the package from which to load fun.

.fileExtensions()

loadFiles(sim, filelist, ...)

# S4 method for class 'simList,missing'
loadFiles(sim, filelist, ...)

# S4 method for class 'missing,ANY'
loadFiles(sim, filelist, ...)

# S4 method for class 'missing,missing'
loadFiles(sim, filelist, ...)

.saveFileExtensions()

Arguments

sim

simList object.

filelist

list or data.frame to call loadFiles directly from the filelist as described in Details

...

Additional arguments.

Value

data.frame of file extension, package, and function mappings

the modified sim, invisibly.

data.frame

Note

Generally not intended to be used by users.

See also

inputs()

Author

Eliot McIntire and Alex Chubaty

Examples

# \donttest{
library(SpaDES.core)

# Load random maps included with package
filelist <- data.frame(
  files = dir(getMapPath(tempdir()), full.names = TRUE),
  functions = "rasterToMemory",
  package = "SpaDES.core"
)
sim1 <- loadFiles(filelist = filelist) # loads all the maps to sim1 simList
#> Setting:
#>   options(
#>     reproducible.cachePath = '/tmp/RtmpiqS17z/reproducible/cache'
#>     spades.inputPath = '/tmp/RtmpiqS17z/SpaDES/inputs'
#>     spades.outputPath = '/tmp/RtmpiqS17z/SpaDES/outputs'
#>     spades.modulePath = '/tmp/RtmpiqS17z/SpaDES/modules'
#>     spades.scratchPath = '/tmp/RtmpiqS17z/SpaDES/scratch'
#>   )
#> Jul28 21:14:13 simInit Using setDTthreads(1). To change: 'options(spades.DTthreads = X)'.
#> Jul28 21:14:13 simInit DEM read from /tmp/RtmpiqS17z/maps/DEM.tif using rasterToMemory
#> Jul28 21:14:14 simInit forestAge read from /tmp/RtmpiqS17z/maps/forestAge.tif using rasterToMemory
#> Jul28 21:14:14 simInit forestCover read from /tmp/RtmpiqS17z/maps/forestCover.tif using rasterToMemory
#> Jul28 21:14:14 simInit habitatQuality read from /tmp/RtmpiqS17z/maps/habitatQuality.tif using rasterToMemory
#> Jul28 21:14:14 simInit percentPine read from /tmp/RtmpiqS17z/maps/percentPine.tif using rasterToMemory
#> Elapsed time for simInit: 0.1698818 secs

# Second, more sophisticated. All maps loaded at time = 0, and the last one is reloaded
#  at time = 10 and 20 (via "intervals").
# Also, pass the single argument as a list to all functions...
#  specifically, when add "native = TRUE" as an argument to the raster function
files <- dir(getMapPath(tempdir()), full.names = TRUE)
arguments <- I(rep(list(lyrs = 1), length(files)))
filelist <- data.frame(
   files = files,
   functions = "terra::rast",
   objectName = NA,
   arguments = arguments,
   loadTime = 0,
   intervals = c(rep(NA, length(files)-1), 10)
)

sim2 <- loadFiles(filelist = filelist) # only does the time = 0 loading; see next
#> Setting:
#>   options(
#>     reproducible.cachePath = '/tmp/RtmpiqS17z/reproducible/cache'
#>     spades.inputPath = '/tmp/RtmpiqS17z/SpaDES/inputs'
#>     spades.outputPath = '/tmp/RtmpiqS17z/SpaDES/outputs'
#>     spades.modulePath = '/tmp/RtmpiqS17z/SpaDES/modules'
#>     spades.scratchPath = '/tmp/RtmpiqS17z/SpaDES/scratch'
#>   )
#> Jul28 21:14:14 simInit Using setDTthreads(1). To change: 'options(spades.DTthreads = X)'.
#> Jul28 21:14:14 simInit DEM read from /tmp/RtmpiqS17z/maps/DEM.tif using rast(inMemory=FALSE)
#> Jul28 21:14:14 simInit forestAge read from /tmp/RtmpiqS17z/maps/forestAge.tif using rast(inMemory=FALSE)
#> Jul28 21:14:14 simInit forestCover read from /tmp/RtmpiqS17z/maps/forestCover.tif using rast(inMemory=FALSE)
#> Jul28 21:14:14 simInit habitatQuality read from /tmp/RtmpiqS17z/maps/habitatQuality.tif using rast(inMemory=FALSE)
#> Jul28 21:14:14 simInit percentPine read from /tmp/RtmpiqS17z/maps/percentPine.tif using rast(inMemory=FALSE)
#> Elapsed time for simInit: 0.08355117 secs
end(sim2) <- 10
sim2 <- spades(sim2) # loads the object at time 10
#> Jul28 21:14:14 simInit Using setDTthreads(1). To change: 'options(spades.DTthreads = X)'.
#> Jul28 21:14:14 chckpn:init total elpsd: 0.085 secs | 0 checkpoint init 0
#> Jul28 21:14:14 save  :init total elpsd: 0.086 secs | 0 save init 0
#> Jul28 21:14:14 prgrss:init total elpsd: 0.088 secs | 0 progress init 0
#> Jul28 21:14:14 load  :init total elpsd: 0.09 secs | 0 load init 0
#> Jul28 21:14:14 load  :inputs total elpsd: 0.092 secs | 10 load inputs 0
#> Jul28 21:14:14 load  :inputs percentPine read from /tmp/RtmpiqS17z/maps/percentPine.tif using rast(inMemory=FALSE)
#> Jul28 21:14:14 load  :inputs    at time 10
#> simList saved in
#> SpaDES.core:::savedSimEnv()$.sim
#> It will be deleted at next spades() call.

# if we extend the end time and continue running, it will load an object scheduled
#  at time = 10, and it will also schedule a new object loading at 20 because
#  interval = 10
end(sim2) <- 20
sim2 <- spades(sim2) # loads the percentPine map 2 more times, once at 10, once at 20
#> Jul28 21:14:14 simInit Using setDTthreads(1). To change: 'options(spades.DTthreads = X)'.
#> Jul28 21:14:14 load  :inputs total elpsd: 0.11 secs | 20 load inputs 0
#> Jul28 21:14:14 load  :inputs percentPine read from /tmp/RtmpiqS17z/maps/percentPine.tif using rast(inMemory=FALSE)
#> Jul28 21:14:14 load  :inputs    at time 20
#> simList saved in
#> SpaDES.core:::savedSimEnv()$.sim
#> It will be deleted at next spades() call.
# }