subject:"\[R\] regex \- extracting src url"

Re: [R] regex - extracting src url

2016-03-22 Thread Martin Morgan




On 03/22/2016 12:44 AM, Omar André Gonzáles Díaz wrote:

Hi,I have a DF with a column with "html", like 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=?;
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$Impression.Tag..image. <-
gsub("","\\1",carreras_normal$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 Gonzáles.

[[alternative HTML version deleted]]

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Re: [R] regex - extracting src url

2016-03-21 Thread Bert Gunter

?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 <- ' 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] "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 André Gonzáles Díaz
 wrote:
> Hi,I have a DF with a column with "html", like 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=?;
> 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$Impression.Tag..image. <-
> gsub("","\\1",carreras_normal$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 Gonzáles.
>
> [[alternative HTML version deleted]]
>
> __
> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

__
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

[R] regex - extracting src url

2016-03-21 Thread Omar André Gonzáles Díaz

Hi,I have a DF with a column with "html", like 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=?;
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$Impression.Tag..image. <-
gsub("","\\1",carreras_normal$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 Gonzáles.

[[alternative HTML version deleted]]

__
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

Re: [R] regex - extracting src url

Re: [R] regex - extracting src url

[R] regex - extracting src url

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