Skip to contents

Make file name and path with optional label, prefix, or postfix

Source: R/make_filename.R
make_filename.Rd

A helper function to create consistent file names for plots created with data files.

Usage

make_filename(
  name = NULL,
  label = NULL,
  fileext = NULL,
  filename = NULL,
  path = NULL,
  prefix = NULL,
  postfix = NULL,
  pad = NULL,
  width = NULL,
  cache = FALSE,
  appname = NULL,
  pkg = NULL,
  create = TRUE,
  increment = NULL,
  call = caller_env()
)

Arguments

name

Name to make file name converted to snake case with janitor::make_clean_names(), e.g. "Residential zoning map" becomes "residential_zoning_map". If the name includes a file extension it is assumed that the filename has been provided as the name parameter.

label

Label to combine with name converted to snake case with janitor::make_clean_names(). The label is designed to identify the area or other shared characteristics across multiple data files, maps, or plots. label is ignored if name is NULL or if name includes a file extension.

fileext

File type or extension. Optional if filename or path include a file extension.

filename

File name; if filename is NULL and path does not include a file extension, name and file extension are both required.

path

Path to file or data directory. Optional. If path includes a file extension and filename and fileext are both NULL, the filename and extension included with path will be used instead. If multiple file extensions are provided to filename, path, or fileext, make_filename() will abort.

prefix

File name prefix. "date" adds a date prefix, "time" adds a date/time prefix; defaults to NULL.

postfix

File name postfix; defaults to NULL.

pad

Single padding character added to digits in string; defaults to "0"

width

Minimum width of padded strings.

cache

If TRUE, path is set to the package cache directory using get_data_dir(); defaults to FALSE.

appname, pkg

pkg is used if appname is NULL. Passed to rappdirs::user_cache_dir()

create

If FALSE and path does not exist, return path with a warning. If TRUE and rlang::is_interactive() is TRUE, ask user if directory should be created. If the session not interactive and create is TRUE, a new directory will be created.

increment

If TRUE, increment digits in string by 1. If numeric, increment digits in string by value. If NULL, 0, or if no digits are present in string, return string as is.

call

The execution environment of a currently running function, e.g. caller_env(). The function will be mentioned in error messages as the source of the error. See the call argument of abort() for more information.

Examples


make_filename(
  filename = "image.jpeg"
)
#> [1] "image.jpeg"

make_filename(
  name = "plot",
  label = "Group a",
  fileext = "png"
)
#> [1] "group_a_plot.png"

make_filename(
  name = "plot",
  prefix = "date",
  fileext = "png"
)
#> [1] "2024-10-29_plot.png"

make_filename(
  name = "map_1",
  increment = TRUE,
  fileext = "geojson"
)
#> [1] "map_2.geojson"