wbt_init: Initialize 'WhiteboxTools'

In giswqs/whiteboxR: 'WhiteboxTools' R Frontend

Initialize 'WhiteboxTools'

Description

wbt_init(): Check if a suitable 'WhiteboxTools' executable is present. Search default path in package directory or set it manually with exe_path.

wbt_options(): Get/set package options

• whitebox.exe_path - character. Path to executable file. The default value is the package installation directory, subdirectory "WBT", followed by whitebox_tools.exe or whitebox_tools. Set the whitebox.exe_path option using wbt_init() exe_path argument

• whitebox.wd - character. Path to WhiteboxTools working directory. Used as --wd argument for tools that support it when wd is not specified elsewhere.

• whitebox.verbose - logical. Should standard output from calls to executable be cat() out for readability? When whitebox.verbose=FALSE no output is produced. Set the value of whitebox.verbose with wbt_verbose() verbose argument. Default is result of interactive() if R package options are unset.

• whitebox.compress_rasters - logical. Should raster output from WhiteboxTools be compressed? Default: NULL uses existing WhiteboxTools settings. Set the value of whitebox.compress_rasters with wbt_compress_rasters() compress_rasters argument.

• whitebox.max_procs - integer. Maximum number of processes for tools that run in parallel or partially parallelize. Default: -1 uses all of the available cores.

wbt_exe_path(): Get the file path of the 'WhiteboxTools' executable.

wbt_runner_path(): Get the file path of the 'WhiteboxTools Runner' executable.

wbt_default_path(): Get the default file path of the 'WhiteboxTools' executable.

wbt_data_dir(): Get the directory where 'WhiteboxTools' data are stored.

wbt_wd(): Get or set the 'WhiteboxTools' working directory. Default: "" (unset) is your R working directory if no other options are set.

wbt_verbose(): Check verbose options for 'WhiteboxTools'

wbt_compress_rasters(): Check raster compression option for 'WhiteboxTools'. Default behavior is based on WhiteboxTools settings.json, package options (if set). Raster compression settings can be overridden in any ⁠wbt_*()⁠ function call by passing the compress_rasters argument directly.

wbt_max_procs(): Check maximum number of processes for for tools that run in parallel or partially parallelize. Default: -1 uses all of the available cores.

Usage

wbt_init(
  exe_path = wbt_exe_path(shell_quote = FALSE),
  ...,
  check_version = TRUE
)

wbt_options(
  exe_path = NULL,
  wd = NULL,
  verbose = NULL,
  compress_rasters = NULL,
  max_procs = NULL
)

wbt_exe_path(exe_path = NULL, shell_quote = TRUE)

wbt_runner_path(shell_quote = TRUE)

wbt_default_path()

wbt_data_dir()

wbt_wd(wd = NULL)

wbt_verbose(verbose = NULL)

wbt_compress_rasters(compress_rasters = NULL)

wbt_max_procs(max_procs = NULL)

Arguments

exe_path	Optional: User-supplied path to 'WhiteboxTools' executable. Default: NULL
...	additional arguments to wbt_options()
check_version	Check version of 'WhiteboxTools' installed against version R package was built for? Default: TRUE
wd	character; Default: NULL; if set the package option whitebox.wd is set specified path (if directory exists)
verbose	logical. Default: NULL; if TRUE or FALSE, set the package option whitebox.verbose to specified value. Tool verbosity settings can be overridden in any ⁠wbt_*()⁠ function call by passing the verbose_mode argument directly.
compress_rasters	logical. Default: NULL; if TRUE or FALSE, set the package option whitebox.compress_rasters to specified value.
max_procs	Default: NULL; if integer, set the package option whitebox.max_procs to specified value
shell_quote	Return shQuote() result?

Details

wbt_exe_path(): Checks system environment variable R_WHITEBOX_EXE_PATH and package option whitebox.exe_path. Set your desired path with either Sys.setenv(R_WHITEBOX_EXE_PATH = "C:/path/to/whitebox_tools.exe") or options(whitebox.exe_path = "C:/path/to/whitebox_tools.exe"). The default, backwards-compatible path is returned by wbt_default_path()

wbt_runner_path(): Returns a path to 'WhiteboxTools Runner' including a platform-specific executable (with or without .exe extension)

wbt_default_path(): Returns a path to 'WhiteboxTools' executable including a platform-specific executable (with or without .exe extension)

wbt_data_dir(): Uses platform-specific user data directory from tools::R_user_dir(package = "whitebox", which = "data") on R 4.0+. On R<4 returns the original default find.package("whitebox").

wbt_wd(): Before you set the working directory in a session the default output will be in your current R working directory unless otherwise specified. You can change working directory at any time by setting the wd argument to wbt_wd() and running a tool. Note that once you have set a working directory, the directory needs to be set somewhere to "replace" the old value; just dropping the flag will not change the working directory back to the R working directory. To "unset" the option in the R package you can use wbt_wd("") which removes the --wd flag from commands and sets the working_directory value in the WhiteboxTools settings.json to "".

Value

wbt_init(): logical; TRUE if binary file is found at exe_path

wbt_options(): an invisible list containing current whitebox.exe_path, whitebox.verbose, whitebox.compress_rasters, and whitebox.max_procs options

Returns the file path of 'WhiteboxTools' executable.

wbt_wd(): character; when working directory is unset, will not add ⁠--wd=⁠ arguments to calls and should be the same as using getwd(). See Details.

wbt_verbose(): logical; returns the result of option "whitebox.verbose_mode", if unset defaults to result of interactive().

wbt_compress_rasters(): logical; returns the result of option "whitebox.compress_rasters", if unset defaults to NA.

wbt_max_procs(): integer; defaults to NA_integer_

See Also

install_whitebox() whitebox

Examples

## Not run: 
## wbt_init():

# set path to binary as an argument
# wbt_init(exe_path = "not/a/valid/path/whitebox_tools.exe")

## End(Not run)
## Not run: 

## wbt_options():

# set multiple options (e.g. exe_path and verbose) with wbt_options()
wbt_options(exe_path = "not/a/valid/path/whitebox_tools.exe", verbose = TRUE)


## End(Not run)
## Not run: 
wbt_exe_path()

## End(Not run)
## Not run: 

## wbt_wd():

# no working directory set
wbt_wd(wd = "")

# set WBT working directory to R working directory
wbt_wd(wd = getwd())

## End(Not run)
## Not run: 

## wbt_verbose():

wbt_verbose(verbose = TRUE)

## End(Not run)
## Not run: 

## wbt_compress_rasters():

wbt_compress_rasters(compress_rasters = TRUE)

## End(Not run)
## Not run: 

## wbt_max_procs():

wbt_max_procs(max_procs = 2)

## End(Not run)

giswqs/whiteboxR documentation built on Oct. 14, 2024, 2:38 a.m.