Save an extract definition to a JSON-formatted file. For an overview of
ipumsr API functionality, see vignette("ipums-api", package = "ipumsr").
save_extract_as_json(extract, file)
| extract | An extract object created with |
|---|---|
| file | File path at which to write the JSON-formatted extract definition. |
The file path where the extract definition was written, invisibly.
Note that this function only saves out the properties of an extract that are required to submit a new extract request, namely, the description, data structure, data format, samples, and variables.
Other ipums_api:
define_extract_from_json(),
define_extract_micro(),
download_extract(),
extract_list_to_tbl(),
extract_tbl_to_list(),
get_extract_info(),
get_last_extract_info(),
get_recent_extracts_info,
ipums_data_collections(),
is_extract_ready(),
revise_extract_micro(),
submit_extract(),
wait_for_extract()
my_extract <- define_extract_micro("usa", "Example", "us2013a", "YEAR") extract_json_path <- file.path(tempdir(), "usa_extract.json") save_extract_as_json(my_extract, file = extract_json_path) copy_of_my_extract <- define_extract_from_json(extract_json_path, "usa") identical(my_extract, copy_of_my_extract) #> [1] TRUE