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/Rtmp4BAZIc/reproducible/cache'
#>     spades.inputPath = '/tmp/Rtmp4BAZIc/SpaDES/inputs'
#>     spades.outputPath = '/tmp/Rtmp4BAZIc/SpaDES/outputs'
#>     spades.modulePath = '/tmp/Rtmp4BAZIc/SpaDES/modules'
#>     spades.scratchPath = '/tmp/Rtmp4BAZIc/SpaDES/scratch'
#>   )
#> May20 20:31:38 simInit Using setDTthreads(1). To change: 'options(spades.DTthreads = X)'.
#> May20 20:31:38 simInit DEM read from /tmp/Rtmp4BAZIc/maps/DEM.tif using rasterToMemory
#> May20 20:31:38 simInit forestAge read from /tmp/Rtmp4BAZIc/maps/forestAge.tif using rasterToMemory
#> May20 20:31:38 simInit forestCover read from /tmp/Rtmp4BAZIc/maps/forestCover.tif using rasterToMemory
#> May20 20:31:38 simInit habitatQuality read from /tmp/Rtmp4BAZIc/maps/habitatQuality.tif using rasterToMemory
#> May20 20:31:38 simInit percentPine read from /tmp/Rtmp4BAZIc/maps/percentPine.tif using rasterToMemory
#> Elapsed time for simInit: 0.1493037 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/Rtmp4BAZIc/reproducible/cache'
#>     spades.inputPath = '/tmp/Rtmp4BAZIc/SpaDES/inputs'
#>     spades.outputPath = '/tmp/Rtmp4BAZIc/SpaDES/outputs'
#>     spades.modulePath = '/tmp/Rtmp4BAZIc/SpaDES/modules'
#>     spades.scratchPath = '/tmp/Rtmp4BAZIc/SpaDES/scratch'
#>   )
#> May20 20:31:38 simInit Using setDTthreads(1). To change: 'options(spades.DTthreads = X)'.
#> May20 20:31:38 simInit DEM read from /tmp/Rtmp4BAZIc/maps/DEM.tif using rast(inMemory=FALSE)
#> May20 20:31:38 simInit forestAge read from /tmp/Rtmp4BAZIc/maps/forestAge.tif using rast(inMemory=FALSE)
#> May20 20:31:38 simInit forestCover read from /tmp/Rtmp4BAZIc/maps/forestCover.tif using rast(inMemory=FALSE)
#> May20 20:31:38 simInit habitatQuality read from /tmp/Rtmp4BAZIc/maps/habitatQuality.tif using rast(inMemory=FALSE)
#> May20 20:31:38 simInit percentPine read from /tmp/Rtmp4BAZIc/maps/percentPine.tif using rast(inMemory=FALSE)
#> Elapsed time for simInit: 0.05729651 secs
end(sim2) <- 10
sim2 <- spades(sim2) # loads the object at time 10
#> May20 20:31:38 simInit Using setDTthreads(1). To change: 'options(spades.DTthreads = X)'.
#> May20 20:31:38 chckpn:init total elpsd: 0.058 secs | 0 checkpoint init 0
#> May20 20:31:38 save  :init total elpsd: 0.06 secs | 0 save init 0
#> May20 20:31:38 prgrss:init total elpsd: 0.061 secs | 0 progress init 0
#> May20 20:31:38 load  :init total elpsd: 0.062 secs | 0 load init 0
#> May20 20:31:38 load  :inputs total elpsd: 0.064 secs | 10 load inputs 0
#> May20 20:31:38 load  :inputs percentPine read from /tmp/Rtmp4BAZIc/maps/percentPine.tif using rast(inMemory=FALSE)
#> May20 20:31:38 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
#> May20 20:31:38 simInit Using setDTthreads(1). To change: 'options(spades.DTthreads = X)'.
#> May20 20:31:38 load  :inputs total elpsd: 0.085 secs | 20 load inputs 0
#> May20 20:31:38 load  :inputs percentPine read from /tmp/Rtmp4BAZIc/maps/percentPine.tif using rast(inMemory=FALSE)
#> May20 20:31:38 load  :inputs    at time 20
#> simList saved in
#> SpaDES.core:::savedSimEnv()$.sim
#> It will be deleted at next spades() call.
# }