Description Usage Arguments Value Methods (by class) See Also Examples
Retrieve the Web environment string returned from an ESearch, EPost or ELink call.
NA
if the History server was not used.
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x |
An |
... |
Further arguments passed on to methods. |
A character string or NA
.
epost
: Retrieve the webenv string from an epost
object.
entrez_uid
: Retrieve the webenv string from an entrez_uid
object.
esearch
: Retrieve the webenv string from an esearch
object.
einfo
, esearch
, esummary
,
efetch
, elink
, epost
,
egquery
, espell
, ecitmatch
.
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Warning: CurlError: Could not resolve host: eutils.ncbi.nlm.nih.gov
NULL
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