Hi,I have a DF with a column with "html", like this: <IMG SRC=" https://ad.doubleclick.net/ddm/trackimp/N344006.1960500FACEBOOKAD/B9589414.130145906;dc_trk_aid=303019819;dc_trk_cid=69763238;ord=[timestamp];dc_lat=;dc_rdid=;tag_for_child_directed_treatment=?" BORDER="0" HEIGHT="1" WIDTH="1" ALT="Advertisement"> I need to get this: https://ad.doubleclick.net/ddm/trackimp/N344006.1960500FACEBOOKAD/B9589414.130145906;dc_trk_aid=303019819;dc_trk_cid=69763238;ord=[timestamp];dc_lat=;dc_rdid=;tag_for_child_directed_treatment= ? I've got this so far: https://ad.doubleclick.net/ddm/trackimp/N344006.1960500FACEBOOKAD/B9589414.130145906;dc_trk_aid=303019819;dc_trk_cid=69763238;ord=[timestamp];dc_lat=;dc_rdid=;tag_for_child_directed_treatment=?\" BORDER=\"0\" HEIGHT=\"1\" WIDTH=\"1\" ALT=\"Advertisement With this is the code I've used: carreras_normal$Impression.Tag..image. <- gsub("<img.+?src=[\"'](.*?)[\"'].*?>","\\1",carreras_normal$Impression.Tag..image., ignore.case = T) *But I still need to use get rid of this part:* https://ad.doubleclick.net/ddm/trackimp/N344006.1960500FACEBOOKAD/B9589414.130145906;dc_trk_aid=303019819;dc_trk_cid=69763238;ord=[timestamp];dc_lat=;dc_rdid=;tag_for_child_directed_treatment= ?*\" BORDER=\"0\" HEIGHT=\"1\" WIDTH=\"1\" ALT=\"Advertisement* Thank you for your help. Omar Gonz?les.
regex - extracting src url
3 messages · Omar André Gonzáles Díaz, Bert Gunter, Martin Morgan
?strsplit #I think My "solution" assumes a fixed format for the URL's as shown in your example. If that is not the case, it doesn't work.
y <- '<IMG SRC="https://ad.doubleclick.net/ddm/trackimp/N344006.1960500FACEBOOKAD/B9589414.130145906;dc_trk_aid=303019819;dc_trk_cid=69763238;ord=[timestamp];dc_lat=;dc_rdid=;tag_for_child_directed_treatment=?"
+ BORDER="0" HEIGHT="1" WIDTH="1" ALT="Advertisement">'
y ## checking that the URL is as expected
[1] "<IMG SRC=\"https://ad.doubleclick.net/ddm/trackimp/N344006.1960500FACEBOOKAD/B9589414.130145906;dc_trk_aid=303019819;dc_trk_cid=69763238;ord=[timestamp];dc_lat=;dc_rdid=;tag_for_child_directed_treatment=?\"\nBORDER=\"0\" HEIGHT=\"1\" WIDTH=\"1\" ALT=\"Advertisement\">"
lapply(strsplit(y,"\""),"[",2) ## should work on a vector of URL's, y
[[1]] [1] "https://ad.doubleclick.net/ddm/trackimp/N344006.1960500FACEBOOKAD/B9589414.130145906;dc_trk_aid=303019819;dc_trk_cid=69763238;ord=[timestamp];dc_lat=;dc_rdid=;tag_for_child_directed_treatment=?" Cheers, Bert Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) On Mon, Mar 21, 2016 at 9:44 PM, Omar Andr? Gonz?les D?az
<oma.gonzales at gmail.com> wrote:
Hi,I have a DF with a column with "html", like this: <IMG SRC=" https://ad.doubleclick.net/ddm/trackimp/N344006.1960500FACEBOOKAD/B9589414.130145906;dc_trk_aid=303019819;dc_trk_cid=69763238;ord=[timestamp];dc_lat=;dc_rdid=;tag_for_child_directed_treatment=?" BORDER="0" HEIGHT="1" WIDTH="1" ALT="Advertisement"> I need to get this: https://ad.doubleclick.net/ddm/trackimp/N344006.1960500FACEBOOKAD/B9589414.130145906;dc_trk_aid=303019819;dc_trk_cid=69763238;ord=[timestamp];dc_lat=;dc_rdid=;tag_for_child_directed_treatment= ? I've got this so far: https://ad.doubleclick.net/ddm/trackimp/N344006.1960500FACEBOOKAD/B9589414.130145906;dc_trk_aid=303019819;dc_trk_cid=69763238;ord=[timestamp];dc_lat=;dc_rdid=;tag_for_child_directed_treatment=?\" BORDER=\"0\" HEIGHT=\"1\" WIDTH=\"1\" ALT=\"Advertisement With this is the code I've used: carreras_normal$Impression.Tag..image. <- gsub("<img.+?src=[\"'](.*?)[\"'].*?>","\\1",carreras_normal$Impression.Tag..image., ignore.case = T) *But I still need to use get rid of this part:* https://ad.doubleclick.net/ddm/trackimp/N344006.1960500FACEBOOKAD/B9589414.130145906;dc_trk_aid=303019819;dc_trk_cid=69763238;ord=[timestamp];dc_lat=;dc_rdid=;tag_for_child_directed_treatment= ?*\" BORDER=\"0\" HEIGHT=\"1\" WIDTH=\"1\" ALT=\"Advertisement* Thank you for your help. Omar Gonz?les. [[alternative HTML version deleted]]
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On 03/22/2016 12:44 AM, Omar Andr? Gonz?les D?az wrote:
Hi,I have a DF with a column with "html", like this: <IMG SRC=" https://ad.doubleclick.net/ddm/trackimp/N344006.1960500FACEBOOKAD/B9589414.130145906;dc_trk_aid=303019819;dc_trk_cid=69763238;ord=[timestamp];dc_lat=;dc_rdid=;tag_for_child_directed_treatment=?" BORDER="0" HEIGHT="1" WIDTH="1" ALT="Advertisement"> I need to get this: https://ad.doubleclick.net/ddm/trackimp/N344006.1960500FACEBOOKAD/B9589414.130145906;dc_trk_aid=303019819;dc_trk_cid=69763238;ord=[timestamp];dc_lat=;dc_rdid=;tag_for_child_directed_treatment= ? I've got this so far: https://ad.doubleclick.net/ddm/trackimp/N344006.1960500FACEBOOKAD/B9589414.130145906;dc_trk_aid=303019819;dc_trk_cid=69763238;ord=[timestamp];dc_lat=;dc_rdid=;tag_for_child_directed_treatment=?\" BORDER=\"0\" HEIGHT=\"1\" WIDTH=\"1\" ALT=\"Advertisement With this is the code I've used: carreras_normal$Impression.Tag..image. <- gsub("<img.+?src=[\"'](.*?)[\"'].*?>","\\1",carreras_normal$Impression.Tag..image., ignore.case = T) *But I still need to use get rid of this part:* https://ad.doubleclick.net/ddm/trackimp/N344006.1960500FACEBOOKAD/B9589414.130145906;dc_trk_aid=303019819;dc_trk_cid=69763238;ord=[timestamp];dc_lat=;dc_rdid=;tag_for_child_directed_treatment= ?*\" BORDER=\"0\" HEIGHT=\"1\" WIDTH=\"1\" ALT=\"Advertisement* Thank you for your help.
You're querying an xml string, so use xpath, e.g., via the XML library > as.character(xmlParse(y)[["//IMG/@SRC"]]) [1] "https://ad.doubleclick.net/ddm/trackimp/N344006.1960500FACEBOOKAD/B9589414.130145906;dc_trk_aid=303019819;dc_trk_cid=69763238;ord=[timestamp];dc_lat=;dc_rdid=;tag_for_child_directed_treatment=?" `xmlParse()` translates the character string into an XML document. `[[` subsets the document to extract a single element. "//IMG/@SRC" follows the xpath specification (this section https://www.w3.org/TR/xpath-31/#abbrev of the specification provides a quick guide) to find, starting from the 'root' of the document, a node, at any depth, labeled IMG containing an attribute labeled SRC. A variation, if there were several IMG tags to be extracted, would be xpathSApply(xmlParse(y), "//IMG/@SRC", as.character)
Omar Gonz?les. [[alternative HTML version deleted]]
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