querykey {reutils} | R Documentation |
An integer query key returned by an ESearch, EPost or ELink call if
the History server was used. Otherwise NA
.
querykey(x, ...)
## S4 method for signature 'epost'
querykey(x, ...)
## S4 method for signature 'entrez_uid'
querykey(x, ...)
## S4 method for signature 'esearch'
querykey(x, ...)
x |
An |
... |
Further arguments passed on to methods. |
An integer or NA
.
epost
: Retrieve the querykey from an epost
object.
entrez_uid
: Retrieve the querykey from an entrez_uid
object.
esearch
: Retrieve the querykey from an esearch
object.
einfo
, esearch
, esummary
,
efetch
, elink
, epost
,
egquery
, espell
, ecitmatch
.
## Not run:
e <- esearch("Mus musculus", "taxonomy", usehistory = TRUE)
querykey(e)
## End(Not run)