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Remove superscripts from HTML objects

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Chris Stubben

Remove superscripts from HTML objects

Is there some way to remove superscripts from objects returned by html/xmlParse (XML package)?

h <- "<html>CataDog</html>"
doc <- htmlParse(h)
xpathSApply(doc, "//p", xmlValue)
[1] "Cata" "Dog"

I could probably remove the tags from the "h" object above, but I'd rather just work with the results from htmlParse if possible (and not use readLines to load raw HTML first).

Thanks,
Chris Stubben

M. Lell

Re: Remove superscripts from HTML objects

Hi,

h <- "<html>CataDog</html>"
sub("<sup.*sup>","",h)

see http://en.wikibooks.org/wiki/R_Programming/Text_Processing for more
information.

Regards!

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S Ellison-2

Re: Remove superscripts from HTML objects

> h <- "<html>CataDog</html>"
> sub("<sup.*sup>","",h)

Probably safer to do

gsub("<sup.*?sup>","",h)

to avoid replacing multiple superscripts.

eg
h2 <- "<html>CataDogMouseaRaccoon</html>"
sub("<sup.*sup>","",h2) #drops everything between first 
gsub("<sup.*?sup>","",h2) #Drops each xxx

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and provide commented, minimal, self-contained, reproducible code.

Chris Stubben

Re: Remove superscripts from HTML objects

Sorry if I was not clear. I wanted to remove the superscripts using xpath queries if possible. For example this will get p nodes with superscripts, but how do I remove the superscripts if there are many matching nodes and different superscripts?

xpathSApply(doc, "//p[sup]", xmlValue)
[1] "Cata"

Chris