Description Fields Methods Extends See Also Examples
The reference classes eutil
, einfo
,
esearch
, esummary
,
efetch
, elink
, epost
,
egquery
, espell
, and
ecitmatch
implement the request generator for interaction
with the NCBI services.
They should not be used direcly, but initialized through the respective
constructor functions einfo
, esearch
,
esummary
, efetch
, elink
,
epost
, egquery
, espell
, and
ecitmatch
.
params
A named list
of query parameters.
errors
A eutil_error
object.
content
Result of an Entrez request stored as a character vector.
get_content(as = "text", ...)
Return the results of an Entrez query as text, xml, json, a textConnection,
or parsed to a list or data.frame; should not be used directly, use
content
instead.
get_error()
Return eutil_error
s; should not be used directly,
use getError
instead.
get_url()
Return the URL used for an Entrez query; should not be used directly,
use getUrl
instead.
perform_query(method = "GET", ...)
Perform an Entrez query using either http GET or POST requests; should not be used directly.
xmlAttr(xpath, name, as = "character", default = NA_character_)
Extract the value of XML attributes given a valid XPath expression and an attribute name
xmlName(xpath, as = "character", default = NA_character_)
Extract the tag names of XML nodes given a valid XPath expression.
xmlSet(xpath, ...)
Extract a set of XML nodes given a valid XPath expression.
xmlValue(xpath, as = "character", default = NA_character_)
Extract the text value of XML leaf nodes given a valid XPath expression.
All reference classes extend and inherit methods from
"envRefClass"
. Furthermore, "einfo"
,
"esearch"
, "esummary"
, "efetch"
, "elink"
,
"epost"
, "egquery"
, "espell"
, and "ecitmatch"
all extend the "eutil"
class.
eutil
, einfo
,
esearch
, esummary
, efetch
,
elink
, epost
, egquery
,
espell
, and ecitmatch
.
1 | showClass("eutil")
|
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.