define_extract | R Documentation |
Specify the parameters for a new IPUMS extract request object to be submitted via the IPUMS API. An extract request contains the specifications required to obtain a particular set of data from an IPUMS collection.
Learn more about the IPUMS API in vignette("ipums-api")
.
Currently, ipumsr supports extract definitions for the following collections:
IPUMS USA: define_extract_usa()
IPUMS CPS: define_extract_cps()
IPUMS International: define_extract_ipumsi()
IPUMS NHGIS: define_extract_nhgis()
These functions produce an ipums_extract
object
with a subclass based on the collection corresponding to the extract request.
The core ipumsr API client tools are designed to handle these objects.
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