Identify the files that can be read from an IPUMS extract.
Arguments
- file
Path to a .zip archive containing the IPUMS extract to be examined.
- file_select
If the path in
filecontains multiple files, a tidyselect selection identifying the files to be included in the output. Only files that match the provided expression will be included.While less useful, this can also be provided as a string specifying an exact file name or an integer to match files by index position.
- types
One or more of
"data","shape", or"codebook"indicating the type of files to include in the output."data"refers to tabular data sources,"shape"refers to spatial data sources, and"codebook"refers to metadata text files that accompany data files.
Value
A tibble containing the types and names of
the available files.
See also
read_ipums_micro() or read_nhgis() to read tabular data
from an IPUMS extract.
read_ipums_sf() to read spatial data from an IPUMS extract.
Examples
nhgis_file <- ipums_example("nhgis0712_csv.zip")
# 2 available data files in this extract (with codebooks)
ipums_list_files(nhgis_file)
#> # A tibble: 4 × 2
#> type file
#> <chr> <chr>
#> 1 data nhgis0712_csv/nhgis0712_ds135_1990_pmsa.csv
#> 2 data nhgis0712_csv/nhgis0712_ds136_1990_pmsa.csv
#> 3 codebook nhgis0712_csv/nhgis0712_ds135_1990_pmsa_codebook.txt
#> 4 codebook nhgis0712_csv/nhgis0712_ds136_1990_pmsa_codebook.txt
# Look for files that match a particular pattern:
ipums_list_files(nhgis_file, file_select = matches("ds136"))
#> # A tibble: 2 × 2
#> type file
#> <chr> <chr>
#> 1 data nhgis0712_csv/nhgis0712_ds136_1990_pmsa.csv
#> 2 codebook nhgis0712_csv/nhgis0712_ds136_1990_pmsa_codebook.txt