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Download STATS19 data for a year

Source: R/dl.R
dl_stats19.Rd

Download STATS19 data for a year

Usage

dl_stats19(
  year = NULL,
  type = NULL,
  data_dir = get_data_directory(),
  file_name = NULL,
  ask = FALSE,
  silent = FALSE,
  timeout = 600
)

Arguments

year

A year matching file names on the STATS19 data release page e.g. 2020

type

One of 'collision', 'casualty', 'Vehicle'; defaults to 'collision'. This text string is used to match the file names released by the DfT.

data_dir

Parent directory for all downloaded files. See get_data_directory() for details.

file_name

The file name (DfT named) to download.

ask

Should you be asked whether or not to download the files? TRUE by default.

silent

Boolean. If FALSE (default value), display useful progress messages on the screen.

timeout

Timeout in seconds for the download if current option is less than this value. Defaults to 600 (10 minutes).

Details

This function downloads UK road crash data. It results in .csv files that are put in a directory that can be set with get_data_directory(). By default, stats19 downloads files to a temporary directory. You can change this behavior to save the files in a permanent directory. This is done by setting the STATS19_DOWNLOAD_DIRECTORY environment variable. A convenient way to do this is by adding STATS19_DOWNLOAD_DIRECTORY=/path/to/a/dir to your .Renviron file, which can be opened with usethis::edit_r_environ().

The file downloaded would be for a specific year (e.g. 2022). It could also be a file containing data for a range of two (e.g. 2005-2014).

The dl_* functions can download many MB of data so ensure you have a sufficient internet access and hard disk space.

See also

get_stats19()

Examples

# \donttest{
if (curl::has_internet()) {
  # type by default is collisions table
  dl_stats19(year = 2022)
  # with type as casualty
  dl_stats19(year = 2022, type = "casualty")
  # try another year
  dl_stats19(year = 2023)
}
#> More than one file found, selecting the first.
#> Files identified: dft-road-casualty-statistics-casualty-2022.csv
#>    https://data.dft.gov.uk/road-accidents-safety-data/dft-road-casualty-statistics-casualty-2022.csv
#> Data saved at /tmp/RtmpUgfY0u/dft-road-casualty-statistics-casualty-2022.csv
#> Files identified: dft-road-casualty-statistics-casualty-2022.csv
#>    https://data.dft.gov.uk/road-accidents-safety-data/dft-road-casualty-statistics-casualty-2022.csv
#> Data already exists in data_dir, not downloading
#> More than one file found, selecting the first.
#> Files identified: dft-road-casualty-statistics-casualty-2023.csv
#>    https://data.dft.gov.uk/road-accidents-safety-data/dft-road-casualty-statistics-casualty-2023.csv
#> Data saved at /tmp/RtmpUgfY0u/dft-road-casualty-statistics-casualty-2023.csv
#> NULL
# }